CN203883998U - Mobile terminal and control system applicable to eavesdropping prevention in confidential places - Google Patents
Mobile terminal and control system applicable to eavesdropping prevention in confidential places Download PDFInfo
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- CN203883998U CN203883998U CN201420139971.XU CN201420139971U CN203883998U CN 203883998 U CN203883998 U CN 203883998U CN 201420139971 U CN201420139971 U CN 201420139971U CN 203883998 U CN203883998 U CN 203883998U
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Abstract
The utility model relates to a mobile terminal and a control system applicable to eavesdropping prevention in confidential places. The mobile terminal applicable to eavesdropping prevention in the confidential places provided by the utility model includes a mobile terminal main board circuit, a mobile terminal battery and a mobile terminal switch-on/switch-off control module; the mobile terminal switch-on/switch-off control module comprises a wireless excitation receiving module, a control processor and a power source control circuit; and the mobile terminal main board circuit, the power source control circuit and the mobile terminal battery are sequentially connected in series. The utility model also provides the control system applicable to eavesdropping prevention in the confidential places. According to the mobile terminal and the control system applicable to eavesdropping prevention in the confidential places of the utility model, after receiving switch-off data, the wireless excitation receiving module transmits the switch-off data to the control processor; the control processor controls the power source control circuit to be in a cut-off state, so that a power supply closed circuit between the mobile terminal main board circuit and the mobile terminal battery can be cut off, and therefore, eavesdropping prevention in the confidential places can be realized, and information security of the confidential places can be effectively guaranteed.
Description
Technical field
The utility model relates to mobile communication, relates in particular to a kind of mobile terminal and the control system that is applicable to concerning security matters place anti-eavesdrop in mobile communication.
Background technology
Along with popularizing of mobile communication technology, mobile phone has become routine work, the indispensable instrument of living, the information-leakage that cellphone subscriber faces simultaneously threatens and also becomes increasingly conspicuous, particularly mobile phone entered after the intelligent machine epoch, cell phone software running environment is open operating system, as Windows Phone, Android and IOS etc., its open interface allows implantation and the operation of various softwares, allows user to download various application software and operates on mobile phone.As PC field, also unavoidably there is various virus and wooden horse in cell phone software, and virus and wooden horse, by the control of mobile phone software and hardware being stolen to user's information, cause economic loss or privacy to reveal to user thus.Wherein some virus or wooden horse can be controlled the switching on and shutting down program of mobile phone, shutdown disguises oneself as close screen, ring in the time of subscriber switch machine after, and open microphone real-time listening mobile phone sound around, or send by mobile communications network after opening camera shooting surrounding enviroment video, photo.These information security hidden danger, except threatening individual privacy, also cause very large threat to the information security of China's national defense, economic field, and for example control is brought into the mobile phone in concerning security matters place (meeting room, office space etc.) and eavesdrops and record a video.
China's concerning security matters place is generally by forbidding that carrying mobile phone mode of entrance prevents from divulging a secret at present, but under some environment, cannot avoid mobile phone to be brought into concerning security matters place completely, if the problems referred to above solve by mobile phone security protection software, due to the continuous renewal of virus, wooden horse and design targetedly, cannot fundamentally solve these information security hidden danger.
Summary of the invention
In order to solve the problems of the prior art, the utility model provides a kind of mobile terminal, control system and control method that is applicable to concerning security matters place anti-eavesdrop.
The utility model provides a kind of mobile terminal that is applicable to concerning security matters place anti-eavesdrop, comprise Mobile terminal main board circuit, battery of mobile terminal and mobile terminal switching on and shutting down control module, wherein, described mobile terminal switching on and shutting down control module comprises wireless excitation receiver module, control processor and power control circuit, described wireless excitation receiver module is connected with described control processor, described control processor is connected with described power control circuit, described Mobile terminal main board circuit, power control circuit, battery of mobile terminal is connected successively, described wireless excitation receiver module receives and closes after machine data, send pass machine data to control processor, by control processor control power control circuit in cut-off state, to cut off Mobile terminal main board circuit, supply access between battery of mobile terminal.
As further improvement of the utility model, described power control circuit comprises control logic circuit, MOS switching tube and current detecting chip, described Mobile terminal main board circuit, MOS switching tube, current detecting chip, battery of mobile terminal are connected successively, described current detecting chip is connected with described control processor, and described MOS switching tube is connected with described control processor by described control logic circuit.
As further improvement of the utility model, described power control circuit also comprises power rectifier, and described power rectifier is connected with described wireless excitation receiver module, control processor, control logic circuit, MOS switching tube and Mobile terminal main board circuit respectively.
As further improvement of the utility model, described mobile terminal also comprises mobile terminal switching on and shutting down button, and described mobile terminal switching on and shutting down button is connected with described control logic circuit.
As further improvement of the utility model, described wireless excitation receiver module comprises embedded antenna for mobile terminal and short-distance wireless transceiving chip, described embedded antenna for mobile terminal is connected with described short-distance wireless transceiving chip, and described short-distance wireless transceiving chip is connected with described control processor.
As further improvement of the utility model, described control processor is provided with timer.
As further improvement of the utility model, described mobile terminal is mobile phone.
The utility model also provides a kind of control system that is applicable to concerning security matters place anti-eavesdrop, comprise the mobile terminal shutdown control base station and the mobile terminal that is applicable to concerning security matters place anti-eavesdrop as described in above-mentioned middle any one that are arranged on concerning security matters place entrance, wherein, base station and the wireless connections of described wireless excitation receiver module are controlled in described mobile terminal shutdown, and described mobile terminal shutdown control base station sends closes machine data to described wireless excitation receiver module.
As further improvement of the utility model, described mobile terminal shutdown is controlled base station and is comprised processor, security module, rf chip, antenna for base station, operation push-button, display screen and power subsystem, described power subsystem respectively with described display screen, security module, processor, rf chip, described processor is connected with described operation push-button, display screen, security module, rf chip respectively, and described rf chip is connected with described antenna for base station.
The utility model also provides a kind of control method that is applicable to concerning security matters place anti-eavesdrop, comprises the following steps:
S100, by mobile terminal shut down control base station to mobile terminal switching on and shutting down control module send close machine data;
S200, cut off the supply access between Mobile terminal main board circuit, battery of mobile terminal by mobile terminal switching on and shutting down control module.
As further improvement of the utility model, step S100 comprises following sub-step:
S101, at concerning security matters place entrance, mobile terminal shutdown is installed and controls base station;
S102, when mobile terminal is during through concerning security matters place entrance, mobile terminal shutdown is controlled base station and is sent the pass machine data with authenticate key to the mobile terminal switching on and shutting down control module of mobile terminal.
As further improvement of the utility model, step S200 comprises following sub-step:
S201, receive and close machine data carry out key discriminating by mobile terminal switching on and shutting down control module;
After S202, authentication are passed through, by mobile terminal switching on and shutting down control module control mobile terminal forced shutdown.
The beneficial effects of the utility model are: pass through such scheme, wireless excitation receiver module receives and closes after machine data, send pass machine data to control processor, by control processor control power control circuit in cut-off state, to cut off the supply access between Mobile terminal main board circuit, battery of mobile terminal, to realize the object of concerning security matters place anti-eavesdrop, effectively ensure the information security in concerning security matters places.
Brief description of the drawings
Fig. 1 is the structured flowchart of the mobile terminal switching on and shutting down control module of a kind of mobile terminal that is applicable to concerning security matters place anti-eavesdrop of the utility model;
Fig. 2 is the structured flowchart that base station is controlled in the mobile terminal shutdown of a kind of mobile terminal that is applicable to concerning security matters place anti-eavesdrop of the utility model;
Fig. 3 the utility model is a kind of structured flowchart of the control system that is applicable to concerning security matters place anti-eavesdrop.
Embodiment
Below in conjunction with brief description of the drawings and embodiment, the utility model is further illustrated.
Drawing reference numeral in Fig. 1 to Fig. 3 is: mobile terminal switching on and shutting down control module 100; Control processor 101; Power control circuit 102; Control logic circuit 1021; MOS switching tube 1022; Current detecting chip 1023; Power rectifier 1024; Wireless excitation receiver module 103; Short-distance wireless transceiving chip 1031; Embedded antenna for mobile terminal 1032; Base station 200 is controlled in mobile terminal shutdown; Processor 201; Security module 202; Rf chip 203; Antenna for base station 204; Operation push-button 205; Display screen 206; Power subsystem 207; Mobile terminal switching on and shutting down button 300; Mobile terminal main board circuit 400; Battery of mobile terminal 500.
As shown in Figure 1 to Figure 3, a kind of mobile terminal that is applicable to concerning security matters place anti-eavesdrop, comprise Mobile terminal main board circuit 400, battery of mobile terminal 500 and mobile terminal switching on and shutting down control module 100, wherein, described mobile terminal switching on and shutting down control module 100 comprises wireless excitation receiver module 103, control processor 101 and power control circuit 102, described wireless excitation receiver module 103 is connected with described control processor 101, described control processor 101 is connected with described power control circuit 102, described Mobile terminal main board circuit 400, power control circuit 102, battery of mobile terminal 500 is connected successively, described wireless excitation receiver module 103 receives and closes after machine data, send pass machine data to control processor 101, control power control circuit 102 in cut-off state by control processor 101, to cut off Mobile terminal main board circuit 400, supply access between battery of mobile terminal 500.
As shown in Figure 1 to Figure 3, described mobile terminal is preferably mobile phone, battery of mobile terminal 500 is preferably battery of mobile phone, Mobile terminal main board circuit 400 is preferably cell phone mainboard circuit, mobile terminal switching on and shutting down button 300 is preferably handset switch machine button, mobile terminal shutdown is controlled base station 200 and is preferably mobile phone shutdown control base station, and mobile terminal switching on and shutting down control module 100 is preferably handset switch machine control module.
As shown in Figure 1 to Figure 3, described power control circuit 102 comprises control logic circuit 1021, MOS switching tube 1022 and current detecting chip 1023, described MOS switching tube 1022 is preferably low on-resistance MOS switching tube, described Mobile terminal main board circuit 400, MOS switching tube 1022, current detecting chip 1023, battery of mobile terminal 500 are connected successively, described current detecting chip 1023 is connected with described control processor 101, and described MOS switching tube 1022 is connected with described control processor 101 by described control logic circuit 1021.
As shown in Figure 1 to Figure 3, described power control circuit 102 also comprises power rectifier 1024, and described power rectifier 1023 is connected with described wireless excitation receiver module 103, control processor 101, control logic circuit 102, MOS switching tube 1022 and Mobile terminal main board circuit 400 respectively.
As shown in Figure 1 to Figure 3, described mobile terminal also comprises mobile terminal switching on and shutting down button 300, and described mobile terminal switching on and shutting down button 300 is connected with described control logic circuit 1021.
As shown in Figure 1 to Figure 3, described wireless excitation receiver module 103 comprises embedded antenna for mobile terminal 1032 and short-distance wireless transceiving chip 1031, described embedded antenna for mobile terminal 1032 is connected with described short-distance wireless transceiving chip 1031, and described short-distance wireless transceiving chip 1031 is connected with described control processor 101.
As shown in Figure 3, a kind of control system that is applicable to concerning security matters place anti-eavesdrop, comprise the mobile terminal shutdown control base station 200 and the mobile terminal that is applicable to concerning security matters place anti-eavesdrop as described in above-mentioned middle any one that are arranged on concerning security matters place entrance, wherein, base station 200 and wireless 100 radio communications of described wireless excitation receiver module are controlled in described mobile terminal shutdown, and described mobile terminal shutdown control base station 200 sends closes machine data to described wireless excitation receiver module 103.
As shown in Figure 1 to Figure 3, described mobile terminal shutdown is controlled base station 200 and is comprised processor 201, security module 202, rf chip 203, antenna for base station 204, operation push-button 205, display screen 206 and power subsystem 207, described power subsystem 207 respectively with described display screen 206, security module 202, processor 201, rf chip 203, described processor 201 is connected with described operation push-button 205, display screen 206, security module 202, rf chip 203 respectively, and described rf chip 203 is connected with described antenna for base station 204.
As shown in Figure 1 to Figure 3, a kind of control method that is applicable to concerning security matters place anti-eavesdrop, comprises the following steps:
S100, shut down and control base station 200 and send and close machine datas to mobile terminal switching on and shutting down control module 100 by mobile terminal;
S200, cut off the supply access between Mobile terminal main board circuit 400, battery of mobile terminal 500 by mobile terminal switching on and shutting down control module 200, to realize anti-eavesdrop.
Step S100 comprises following sub-step:
S101, at concerning security matters place entrance, mobile terminal shutdown is installed and controls base station 200;
S102, when mobile terminal is during through concerning security matters place entrance, mobile terminal shutdown is controlled base station 200 and is sent the pass machine data with authenticate key to the mobile terminal switching on and shutting down control module 100 of mobile terminal.
Step S200 comprises following sub-step:
S201, receive and close machine datas and carry out key discriminating by mobile terminal switching on and shutting down control module 100;
After S202, authentication are passed through, control mobile terminal forced shutdown by mobile terminal switching on and shutting down control module 100.
The utility model provides a kind of mobile terminal that is applicable to concerning security matters place anti-eavesdrop, can be used on the mobile phone that often needs the personnel in discrepancy concerning security matters place, in the time entering concerning security matters place, can cut off manually or automatically cellular phone power supplies it is shut down completely.
The utility model also provides a kind of control system that is applicable to concerning security matters place anti-eavesdrop, mobile terminal shutdown is controlled to base station 200 and be arranged on gateway, concerning security matters place, can automatically control the control base station equipment of mobile phone shutdown, when the mobile phone that mobile terminal switching on and shutting down control module 100 is installed is during through gateway, base station 200 wireless signal emissions are controlled in mobile terminal shutdown forces mobile phones to enter dump state.
In the time that handset switch machine button is pressed, after power control circuit 102 is triggered in conducting state, mobile phone custom circuit is by original flow process starting up, power control circuit 102 detects that the electric current in power path reaches the conducting state that maintains power control circuit 102 after normal work limit value, keeps the normal work of mobile phone.After start work, when being pressed again, handset switch machine button exceedes after certain hour, mobile phone custom circuit enters off-mode by original design, power control circuit 102 detects that in power path, electric current reduces to shutdown limit value, differentiate mobile phone custom circuit and after off-mode, automatically cut off the conducting of closing pipe 1022 for MOS days, make mobile phone in the complete dissengaged positions of definite power supply.Wireless excitation receiver module 103 is reception of wireless signals module, control after the off signal that base station 200 sends when receiving mobile terminal shutdown, this signal receives to close through wireless excitation receiver module 103 and sends control processor 101 to, control power control circuit 102 in cut-off state by it, force disconnect mobile phone custom circuit power supply, can cut off supply access between Mobile terminal main board circuit 400, battery of mobile terminal 500 and realize by mobile terminal switching on and shutting down control module 100 shutdown completely of mobile phone, reach the object of anti-eavesdrop.
The electric current that mobile terminal switching on and shutting down control module 100 flows through power control circuit 102 by detection judges switching on and shutting down operation and the state of mobile phone custom circuit, carries out corresponding bottom switching on and shutting down operation, guarantees the normal shutdown operation of mobile phone.
The control processor 101 of mobile terminal switching on and shutting down control module 100 is with timing function, exceeding 60 seconds mobile phones appoints and does not enter off-mode, think mobile phone shutdown operation exception, force mobile terminal switching on and shutting down control module 100 in by state, make mobile phone in shutdown (power-off) state completely.
Mobile terminal switching on and shutting down control module 100 is self-contained unit, between serial access Mobile terminal main board circuit 400, battery of mobile terminal 500, does not need the original circuit design of mobile phone to change.
The power turn-on of mobile terminal switching on and shutting down control module 100 is controlled and is not needed to increase extra button or switch with cut-off.
Mobile terminal switching on and shutting down control module 100, for working alone completely, is not subject to software program control in mobile phone custom circuit or mobile phone.
Mobile terminal switching on and shutting down control module 100, with wireless stimulating module, can receive the off signal from the transmitting of mobile phone shutdown control base station equipment, automatically carries out mobile phone force disconnect power supply.
The off signal of launching base station 200 is controlled in mobile terminal shutdown authenticate key, and mobile terminal switching on and shutting down control module 100 is only authenticating by the rear power-off operation of just carrying out.
A kind of mobile terminal, control system and control method that is applicable to concerning security matters place anti-eavesdrop that the utility model provides, realize the controlled power-off operation of safety of mobile phone, effectively prevented from realizing the behavior of mobile phone call, scene around being recorded and being sent by wireless network steal information by mobile phone " pseudo-shutdown " mode.
Mobile terminal switching on and shutting down control module 100 can work alone, and also accepts the Long-distance Control of mobile terminal shutdown control base station 200.
Switching on and shutting down operation is used the original switching on and shutting down button of mobile phone, and can differentiate the power-off operation that user carries out by software interface, and to mobile phone, original design is not almost changed, and has stronger feasibility.
Mobile terminal switching on and shutting down control module 100 can be integrated in 8 × 5 × 2mm
3module in, when Cell Phone Design, do not need original Electric Design of mobile phone to change, as long as be serially connected in hardware circuit in the middle of battery and mobile phone custom circuit.
The power consumption of mobile terminal switching on and shutting down control module 100 is extremely low, lower than 1mW, on not forming impact the normal working hours of mobile phone.
Mobile terminal switching on and shutting down control module 100 is operational module independently, and its switching on and shutting down work is not subject to the control of mobile phone hardware circuit and software.Rapid conducting mobile phone and intercell connection in the time of start, ensure the normal boot-strap operation of mobile phone, and maintain power turn-on state after differentiation mobile phone power-on; In the time of shutdown, cut off the power supply of mobile phone and the power supply of module self completely, guarantee cannot be passed through the start of certain means control mobile phone.
A kind of accurately current drain of detection of handset custom circuit of mobile terminal that is applicable to concerning security matters place anti-eavesdrop that the utility model provides, accurately differentiate thus work, standby and the off-mode of mobile phone, can differentiate restarting isotype and carrying out corresponding power management operations of mobile phone.
The utility model may be forgotten the possibility of closing hand phone when entering concerning security matters place, designed can long distance forced mobile phone shutdown mobile terminal shutdown control base station 200, this implantation of device is at the entrance in concerning security matters place, in the time the mobile phone of mobile terminal switching on and shutting down control module 100 has been installed is carried the signal cover through switching on and shutting down control base station, mobile terminal shutdown is controlled base station 200 wireless signal emissions and is forced to control mobile phones and enter dump state.
Mobile terminal switching on and shutting down control module 100, in the time of Cell Phone Design, is designed in connection line that serial interface enters mobile phone custom circuit and battery, and the start control pin of mobile terminal switching on and shutting down control module 100 is connected on the switching on and shutting down button of mobile phone.
When mobile phone is during in off-mode, if handset switch machine button is pressed, the controlled conducting processed of MOS switching tube 1022, the power supply circuits conducting between cell phone mainboard circuit (being called again mobile phone custom circuit) and battery of mobile phone, mobile phone enters conventional start operating process.Meanwhile, control processor 101 is also switched on and is entered operating state.
Current detecting chip 1023 can accurate measurement mobile phone current sinking, can accurately differentiate that cell phone mainboard circuit is in running order, holding state, or off-mode.
The control processor 101 of handset switch machine control module detects by current detecting chip 1023 electric current that flows through MOS switching tube 1022, in the time that electric current reaches mobile phone running current value, think that mobile phone is in open state, control and maintain MOS switching tube 1022 in conducting state, mobile phone enters normal operating conditions.
In the time that mobile phone carries out power-off operation, control processor 101 detects the operation from handset switch machine button on the one hand, the power consumption of detection of handset simultaneously, when current sinking reaches shutdown when the limit and maintains after limiting time, think that mobile phone shuts down, automatically close the control to MOS switching tube 1022, realize the cut-out completely of cellular phone power supplies, handset switch machine control module self power supply is also cut off simultaneously.Control processor 101 inside arrange a timer, when detect handset switch machine button be pressed (power-off operation) exceed and do not detect yet that mobile phone is in off-mode 60 seconds, differentiate for mobile phone shutdown abnormal (for example, because the vacation that is subject to virus control is shut down), force disconnect mobile phone custom circuit power supply.
Handset switch machine control module detects when mobile phone current sinking reaches the shutdown limit, after maintaining 10 seconds, just cuts off the electricity supply, and ensures that thus the functions such as restarting of mobile phone are unaffected.
Differentiate the shutdown of mobile phone by detection of handset current sinking, can guarantee that user does not use switch switch but carries out power-off operation by the shut-off function of cell phone software, also can accurately differentiate the off-mode of mobile phone.
The built-in 2.45GHz short-distance wireless communication module of handset switch machine control module, can receive from the off signal of mobile phone shutdown control base station equipment transmitting within the scope of 5 meters and carry out key discriminating, and authentication is by the power-off of rear control processor pressure mobile phone shutdown.
Mobile phone shutdown control base station equipment is a simple wireless base station apparatus, is made up of processor, radio frequency unit and secret unit.Secret unit is supervised by country or information security department of army, guarantees the fail safe of module.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (9)
1. one kind is applicable to the mobile terminal of concerning security matters place anti-eavesdrop, it is characterized in that: comprise Mobile terminal main board circuit, battery of mobile terminal and mobile terminal switching on and shutting down control module, wherein, described mobile terminal switching on and shutting down control module comprises wireless excitation receiver module, control processor and power control circuit, described wireless excitation receiver module is connected with described control processor, described control processor is connected with described power control circuit, described Mobile terminal main board circuit, power control circuit, battery of mobile terminal is connected successively, described wireless excitation receiver module receives and closes after machine data, send pass machine data to control processor, by control processor control power control circuit in cut-off state, to cut off Mobile terminal main board circuit, supply access between battery of mobile terminal.
2. the mobile terminal that is applicable to concerning security matters place anti-eavesdrop according to claim 1, it is characterized in that: described power control circuit comprises control logic circuit, MOS switching tube and current detecting chip, described Mobile terminal main board circuit, MOS switching tube, current detecting chip, battery of mobile terminal are connected successively, described current detecting chip is connected with described control processor, and described MOS switching tube is connected with described control processor by described control logic circuit.
3. the mobile terminal that is applicable to concerning security matters place anti-eavesdrop according to claim 2, it is characterized in that: described power control circuit also comprises power rectifier, described power rectifier is connected with described wireless excitation receiver module, control processor, control logic circuit, MOS switching tube and Mobile terminal main board circuit respectively.
4. the mobile terminal that is applicable to concerning security matters place anti-eavesdrop according to claim 2, is characterized in that: described mobile terminal also comprises mobile terminal switching on and shutting down button, and described mobile terminal switching on and shutting down button is connected with described control logic circuit.
5. the mobile terminal that is applicable to concerning security matters place anti-eavesdrop according to claim 1, it is characterized in that: described wireless excitation receiver module comprises embedded antenna for mobile terminal and short-distance wireless transceiving chip, described embedded antenna for mobile terminal is connected with described short-distance wireless transceiving chip, and described short-distance wireless transceiving chip is connected with described control processor.
6. the mobile terminal that is applicable to concerning security matters place anti-eavesdrop according to claim 1, is characterized in that: described control processor is provided with timer.
7. the mobile terminal that is applicable to concerning security matters place anti-eavesdrop according to claim 1, is characterized in that: described mobile terminal is mobile phone.
8. one kind is applicable to the control system of concerning security matters place anti-eavesdrop, it is characterized in that: comprise the mobile terminal shutdown control base station and the mobile terminal that is applicable to concerning security matters place anti-eavesdrop as described in claim 1 to 7 any one that are arranged on concerning security matters place entrance, wherein, base station and the wireless connections of described wireless excitation receiver module are controlled in described mobile terminal shutdown, and described mobile terminal shutdown control base station sends closes machine data to described wireless excitation receiver module.
9. the control system that is applicable to concerning security matters place anti-eavesdrop according to claim 8, it is characterized in that: described mobile terminal shutdown is controlled base station and comprised processor, security module, rf chip, antenna for base station, operation push-button, display screen and power subsystem, described power subsystem respectively with described display screen, security module, processor, rf chip, described processor is connected with described operation push-button, display screen, security module, rf chip respectively, and described rf chip is connected with described antenna for base station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420139971.XU CN203883998U (en) | 2014-03-26 | 2014-03-26 | Mobile terminal and control system applicable to eavesdropping prevention in confidential places |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420139971.XU CN203883998U (en) | 2014-03-26 | 2014-03-26 | Mobile terminal and control system applicable to eavesdropping prevention in confidential places |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203883998U true CN203883998U (en) | 2014-10-15 |
Family
ID=51684456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420139971.XU Withdrawn - After Issue CN203883998U (en) | 2014-03-26 | 2014-03-26 | Mobile terminal and control system applicable to eavesdropping prevention in confidential places |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203883998U (en) |
-
2014
- 2014-03-26 CN CN201420139971.XU patent/CN203883998U/en not_active Withdrawn - After Issue
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141015 Effective date of abandoning: 20180209 |