CN218352658U - Power amplifier - Google Patents
Power amplifier Download PDFInfo
- Publication number
- CN218352658U CN218352658U CN202222459905.8U CN202222459905U CN218352658U CN 218352658 U CN218352658 U CN 218352658U CN 202222459905 U CN202222459905 U CN 202222459905U CN 218352658 U CN218352658 U CN 218352658U
- Authority
- CN
- China
- Prior art keywords
- power amplifier
- electrically connected
- external
- amplifier
- switches
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
The application provides a power amplifier, power amplifier includes: the power amplifier comprises a plurality of preamplification modules, a plurality of buses, a plurality of switches and a plurality of power amplifiers, wherein the number of the switches is the product of the number of the power amplifiers and the number of the preamplification modules; each power amplifier is electrically connected with an external loudspeaker; each pre-amplification module is electrically connected with external signal input equipment; aiming at any pre-amplification module, the pre-amplification module is electrically connected with each power amplifier through a bus and a target number of switches; the target number is the number of pre-amplification modules/power amplifiers. According to the method and the device, different types of audio contents can be played in the same area by one power amplifier, and the different areas can be played in a partitioned mode by one power amplifier, so that the cost is reduced.
Description
Technical Field
The application relates to the technical field of sound equipment power amplifiers, in particular to a power amplifier.
Background
Along with the development of society, the requirement of people on the quality of daily life is gradually improved, so that the power amplifier is widely applied to business occasions such as business superman, clothing stores and restaurant stores, and the shopping experience of customers is greatly improved.
Then, in the prior art, different merchants, clothing stores, and restaurants have different demands for power amplifiers in different scenes, but the existing power amplifiers can only realize one play mode in one application scene and cannot realize the partition play, and if the partition play is to be realized, only one power amplifier can be placed in different areas of the application scene, which results in higher cost.
SUMMERY OF THE UTILITY MODEL
In view of this, an object of the present application is to provide a power amplifier, in which an embodiment of the present application can implement that one power amplifier plays different types of audio contents in the same area, and implement that one power amplifier plays different areas in different partitions, so as to reduce the cost.
The embodiment of the application provides a power amplifier, the power amplifier includes: the power amplifier comprises a plurality of preamplification modules, a plurality of buses, a plurality of switches and a plurality of power amplifiers, wherein the number of the switches is the product of the number of the power amplifiers and the number of the preamplification modules; each power amplifier is electrically connected with an external loudspeaker; each pre-amplification module is electrically connected with external signal input equipment;
for any pre-amplification module, the pre-amplification module is electrically connected with each power amplifier through one bus and a target number of the switches; the target number is the number of pre-amplification modules or the number of power amplifiers.
Further, if the target number is the number of the power amplifiers; for any pre-amplification module, the pre-amplification module is electrically connected with a bus, the bus is electrically connected with a target number of switches, and the target number of switches are electrically connected with one power amplifier.
Further, if the target number is the number of the preamplification modules; for any of the pre-amplification modules, the pre-amplification module is electrically connected to the target number of switches, one of the target number of switches is electrically connected to one bus, and the bus is electrically connected to one power amplifier.
Further, the external signal input device includes an external USB flash drive, an external bluetooth, and an external audio input device.
Further, the pre-amplifier module comprises a decoder and/or a pre-amplifier.
Further, if the pre-amplification module is a decoder and the external signal input device is an external USB flash drive, the decoder is electrically connected to the external USB flash drive.
Further, if the pre-amplification module is a decoder and the external signal input device is an external bluetooth, the decoder is electrically connected with the external bluetooth.
Further, if the pre-amplifier module is a pre-amplifier and the external signal input device is an external audio input device, the pre-amplifier is electrically connected to the external audio input device.
Further, if the pre-amplifier module is a pre-amplifier and the external audio input device is a microphone, the pre-amplifier is electrically connected to the microphone.
Further, each of the power amplifiers is electrically connected to at least one external speaker.
Compared with the power amplifier in the prior art, the power amplifier provided by the embodiment of the application can realize that one power amplifier plays different types of audio contents in the same area and can realize that one power amplifier plays different areas in a partitioned manner by integrating the plurality of buses, the plurality of switches, the plurality of preamplification modules and the plurality of power amplifiers into one power amplifier, so that the cost is reduced.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 illustrates one of the schematic structural diagrams of a power amplifier provided in the embodiments of the present application;
fig. 2 illustrates a second schematic structural diagram of a power amplifier according to an embodiment of the present disclosure;
fig. 3 is a third schematic diagram illustrating a power amplifier according to an embodiment of the present disclosure;
fig. 4 illustrates a fourth schematic diagram of a power amplifier according to an embodiment of the present application.
In the figure:
10-a power amplifier; 100-a pre-amplification module; 110-a decoder; 120-a preamplifier; 200-bus bar; 300-a switch; 400-a power amplifier; 500-an external signal input device; 510-external USB flash drive; 520-external bluetooth; 530 — an external audio input device; 600-external speaker.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. Every other embodiment that can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present application falls within the protection scope of the present application.
First, an application scenario to which the present application is applicable will be described. The application can be applied to the technical field of sound equipment power amplification.
Research shows that in the prior art, different merchants and clothing stores and restaurants have different requirements on power amplifiers in different scenes, but the existing power amplifiers can only realize one play mode in one application scene and cannot realize zone play, and if the zone play is to be realized, only one power amplifier can be placed in different areas of the application scene, which results in higher cost.
Therefore, the embodiments of the present application provide a power amplifier, which can implement that one power amplifier plays different types of audio contents in the same area, and can implement that one power amplifier plays different areas in different zones, thereby reducing the cost.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a power amplifier according to an embodiment of the present disclosure. As shown in fig. 1, a power amplifier 10 provided in an embodiment of the present application includes: a plurality of pre-amplification modules 100, a plurality of bus bars 200, a plurality of switches 300 and a plurality of power amplifiers 400, wherein the number of the switches 300 is the product of the number of the power amplifiers 400 and the pre-amplification modules 100; each of the power amplifiers 400 is electrically connected to an external speaker 600; each of the pre-amplifier modules 100 is electrically connected to an external signal input device 500.
In the above description, the power amplifier 400 is used to mix the multiple audio signals sent from the switch 300 and amplify the mixed signals to the voltage required by the external speaker 600.
The power amplifier 10 provided in the embodiment of the present application is shown as a first specific embodiment, wherein a plurality of pre-amplification modules 100 may be specifically, but not limited to, two, where the number of the pre-amplification modules 100 and the number of the power amplifiers 400 are set to 2, and at this time:
for any of the pre-amplification modules 100, the pre-amplification module 100 is electrically connected to each of the power amplifiers 400 through one of the bus bars 200 and a target number of the switches 300; the target number is the number of pre-amplification modules 100 or the number of power amplifiers 400.
Here, the pre-amp module 100 is designed to adjust the audio signal voltage inputted from the external signal input device 500 to a level required by a subsequent stage, and is designed to receive a weak voltage signal from the external signal input device 500.
If the target number is the number of power amplifiers 400.
Here, for the setting of the number of the bus bars 200, it is necessary that the number of the bus bars 200 is secured as the number of the pre-amplification modules 100 or the number of the power amplifiers 400.
The bus 200 is used for transmitting the signal output by the pre-amplification module 100 to each switch 300, or transmitting the output signal of each switch 300 to the corresponding power amplifier 400.
For any of the pre-amplification modules 100, the pre-amplification module 100 is electrically connected to one bus bar 200, the bus bar 200 is electrically connected to a target number of switches 300, and the target number of switches 300 are electrically connected to one power amplifier 400.
Here, the switch 300 is used to realize turning off of each power amplifier 400 in combination with a master, that is, by controlling the turning off of the inductive switch 300, control of different power amplifiers 400 is realized, so as to realize signal distribution of different playing areas.
Compared with the devices in the prior art, the power amplifier 10 provided in the embodiment of the present application integrates the multiple busbars 200, the multiple switches 300, the multiple preamplification modules 100, and the multiple power amplifiers 400 into one power amplifier 10, so as to implement signal distribution of different types of play modes and play contents in different areas, and please implement that one power amplifier plays different types of audio contents in the same area, and implement that one power amplifier 10 plays different areas in different partitions, thereby reducing the cost.
Referring to fig. 2, fig. 2 is a second schematic diagram of a power amplifier 10 according to an embodiment of the present disclosure. As shown in fig. 2, a power amplifier provided in an embodiment of the present application includes:
a plurality of preamplification modules 100, a plurality of bus bars 200, a plurality of switches 300 and a plurality of power amplifiers 400, wherein the number of the switches 300 is the product between the number of the power amplifiers 400 and the number of the preamplification modules 100; each of the power amplifiers 400 is electrically connected to an external speaker 600; each of the pre-amplification modules 100 is electrically connected to an external signal input device 500.
For any of the pre-amplification modules 100, the pre-amplification module 100 is electrically connected to each of the power amplifiers 400 through one of the bus bars 200 and a target number of the switches 300; the target number is the number of pre-amplification modules 100 or the number of power amplifiers 400.
If the target number is the number of pre-amplification modules 100.
For any of the pre-amplification modules 100, the pre-amplification module 100 is electrically connected to a target number of switches 300, one switch 300 of the target number of switches 300 is electrically connected to one bus bar 200, and the bus bar 200 is electrically connected to one power amplifier 400.
Here, different from the embodiment in fig. 1, in the second embodiment provided in the present application, the bus bar 200 is directly electrically connected to the power amplifier 400, that is, different connection modes of the bus bar 200 are realized, and in the second embodiment provided in the present application, the number of the pre-amplification modules 100 and the number of the power amplifiers 400 are also set to be 2, in the above, the number of the pre-amplification modules 100 and the number of the power amplifiers 400 may be set to be the same or different according to different application scenarios.
Compared with the devices in the prior art, the power amplifier 10 provided in the embodiment of the present application integrates the multiple busbars 200, the multiple switches 300, the multiple preamplification modules 100, and the multiple power amplifiers 400 into one power amplifier 10, so as to implement signal distribution of different types of play modes and play contents in different areas, and please implement that one power amplifier plays different types of audio contents in the same area, and implement that one power amplifier 10 plays different areas in different partitions, thereby reducing the cost.
Referring to fig. 3, fig. 3 is a third schematic structural diagram of a power amplifier according to an embodiment of the present disclosure. As shown in fig. 3, a power amplifier 10 provided in the embodiment of the present application includes:
a plurality of pre-amplification modules 100, a plurality of bus bars 200, a plurality of switches 300, and a plurality of power amplifiers 400, wherein the number of switches 300 is the product of the number of power amplifiers 400 and the number of pre-amplification modules 100; each of the power amplifiers 400 is electrically connected to an external speaker 600; each of the pre-amplification modules 100 is electrically connected to an external signal input device 500.
The power amplifier 10 provided in the embodiment of the present application is shown as a third specific embodiment, where the number of the pre-amplification modules 100 and the number of the power amplifiers 400 are three, in this case:
for any pre-amplification module 100, the pre-amplification module 100 is electrically connected to each power amplifier 400 through one bus bar 200 and a target number of the switches 300; the target number is the number of pre-amplification modules 100 or the number of power amplifiers 400.
If the target number is the number of power amplifiers 400.
For any of the pre-amplification modules 100, the pre-amplification module 100 is electrically connected to one bus 200, the bus 200 is electrically connected to a target number of switches 300, and the target number of switches 300 are electrically connected to one power amplifier 400.
The external signal input device 500 includes an external USB flash drive 510, an external bluetooth 520, and an external audio input device 530.
Here, the external signal input device 500 is a variety of audio input devices externally accessible to the pre-amplification module 100, but is not limited to the above.
The pre-amplifier module 100 includes a decoder 110 and/or a pre-amplifier 120.
Here, the decoder 110 is configured to convert different types of input signals of the external USB flash drive 510, the external bluetooth 520, and the external audio input device 530 in the external signal input device 500 into corresponding audio signals, and if music files of the external USB flash drive 510 and the external bluetooth 520 are converted into corresponding audio signals.
Further, if one of the pre-amplification modules 100 is a decoder 110 and one of the external signal input devices 500 is an external USB flash drive 510, the decoder 110 is electrically connected to the external USB flash drive 510.
Here, the external USB flash drive 510 converts the internal audio file into a corresponding audio signal through the decoder 110 and delivers the audio signal to the power amplifier 400.
Further, if one of the pre-amplifier modules 100 is a decoder 110 and one of the external signal input devices 500 is an external bluetooth 520, the decoder 110 is electrically connected to the external bluetooth 520.
Further, if one of the pre-amplifier modules 100 is the pre-amplifier 120, one of the external signal input devices 500 is the external audio input device 530, and the external audio input device 530 is a microphone, the pre-amplifier 120 is electrically connected to the microphone.
Here, the external audio input device 530 includes, but is not limited to, a microphone.
Further, each of the power amplifiers 400 is electrically connected to at least one external speaker 600.
Here, each power amplifier 400 may be electrically connected to a plurality of external speakers 600 according to the requirements of different application scenarios, so as to implement an audio playing function in different areas, or to implement an amplification playing function in different areas for certain types of audio.
Compared with the devices in the prior art, the power amplifier 10 provided in the embodiment of the present application integrates the multiple busbars 200, the multiple switches 300, the multiple preamplification modules 100, and the multiple power amplifiers 400 into one power amplifier 10, so as to implement signal distribution of different types of play modes and play contents in different areas, and please implement that one power amplifier plays different types of audio contents in the same area, and implement that one power amplifier 10 plays different areas in different partitions, thereby reducing the cost.
Referring to fig. 4, fig. 4 is a fourth schematic diagram of a power amplifier 10 according to an embodiment of the present disclosure. As shown in fig. 4, a power amplifier 10 provided in the embodiment of the present application includes:
a plurality of preamplification modules 100, a plurality of bus bars 200, a plurality of switches 300 and a plurality of power amplifiers 400, wherein the number of the switches 300 is the product between the number of the power amplifiers 400 and the number of the preamplification modules 100; each of the power amplifiers 400 is electrically connected to an external speaker 600; each of the pre-amplifier modules 100 is electrically connected to an external signal input device 500.
The power amplifier 10 provided in the embodiment of the present application is shown as a fourth specific embodiment, where the number of the pre-amplification modules 100 and the number of the power amplifiers 400 are three, in this case:
for any of the pre-amplification modules 100, the pre-amplification module 100 is electrically connected to each of the power amplifiers 400 through one of the bus bars 200 and a target number of the switches 300; the target number is the number of pre-amplification modules 100 or the number of power amplifiers 400.
If the target number is the number of pre-amplification modules 100.
For any of the pre-amplification modules 100, the pre-amplification module 100 is electrically connected to a target number of switches 300, one switch 300 of the target number of switches 300 is electrically connected to one bus 200, and the bus 200 is electrically connected to one power amplifier 400.
The external signal input device 500 includes an external USB flash drive 510, an external bluetooth 520, and an external audio input device 530.
The pre-amplifier module 100 includes a decoder 110 and/or a pre-amplifier 120.
Further, if one of the pre-amplification modules 100 is a decoder 110 and one of the external signal input devices 500 is an external USB flash drive 510, the decoder 110 is electrically connected to the external USB flash drive 510.
Further, if one of the pre-amplifier modules 100 is a decoder 110 and one of the external signal input devices 500 is an external bluetooth 520, the decoder 110 is electrically connected to the external bluetooth 520.
Further, if one of the pre-amplifier modules 100 is the pre-amplifier 120, one of the external signal input devices 500 is the external audio input device 530, and the external audio input device 530 is a microphone, the pre-amplifier 120 is electrically connected to the microphone.
Further, each of the power amplifiers 400 is electrically connected to at least one external speaker 600.
Compared with the devices in the prior art, the power amplifier 10 provided in the embodiment of the present application integrates the multiple busbars 200, the multiple switches 300, the multiple preamplification modules 100, and the multiple power amplifiers 400 into one power amplifier 10, so as to implement signal distribution of different types of play modes and play contents in different areas, and please implement that one power amplifier plays different types of audio contents in the same area, and implement that one power amplifier 10 plays different areas in different partitions, thereby reducing the cost.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a USB flash drive, a portable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used to illustrate the technical solutions of the present application, but not to limit the technical solutions, and the scope of the present application is not limited to the above-mentioned embodiments, although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present application and are intended to be covered by the appended claims. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A power amplifier, comprising: the power amplifier comprises a plurality of preamplification modules, a plurality of buses, a plurality of switches and a plurality of power amplifiers, wherein the number of the switches is the product of the number of the power amplifiers and the number of the preamplification modules; each power amplifier is electrically connected with an external loudspeaker; each pre-amplification module is electrically connected with external signal input equipment;
for any pre-amplification module, the pre-amplification module is electrically connected with each power amplifier through one bus and a target number of the switches; the target number is the number of pre-amplification modules or the number of power amplifiers.
2. The power amplifier of claim 1, wherein if the target number is the number of power amplifiers; for any pre-amplification module, the pre-amplification module is electrically connected with a bus, the bus is electrically connected with a target number of switches, and the target number of switches are electrically connected with one power amplifier.
3. The power amplifier of claim 1, wherein if the target number is the number of pre-amplifier modules; for any of the pre-amplification modules, the pre-amplification module is electrically connected to the target number of switches, one of the target number of switches is electrically connected to one bus, and the bus is electrically connected to one power amplifier.
4. The power amplifier of claim 1, wherein the external signal input devices comprise an external USB flash drive, an external bluetooth, and an external audio input device.
5. The power amplifier of claim 4, wherein the pre-amplifier module comprises a decoder and/or a pre-amplifier.
6. The power amplifier of claim 5, wherein if the pre-amplification module is a decoder and the external signal input device is an external USB flash drive, the decoder is electrically connected to the external USB flash drive.
7. The power amplifier of claim 5, wherein if the pre-amplifier module is a decoder and the external signal input device is an external Bluetooth, the decoder is electrically connected to the external Bluetooth.
8. The power amplifier of claim 5, wherein if the pre-amplifier module is a pre-amplifier and the external signal input device is an external audio input device, the pre-amplifier is electrically connected to the external audio input device.
9. The power amplifier of claim 8, wherein if the pre-amplifier module is a pre-amplifier and the external audio input device is a microphone, the pre-amplifier is electrically connected to the microphone.
10. The power amplifier of claim 1, wherein each of the power amplifiers is electrically connected to at least one external speaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222459905.8U CN218352658U (en) | 2022-09-16 | 2022-09-16 | Power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222459905.8U CN218352658U (en) | 2022-09-16 | 2022-09-16 | Power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218352658U true CN218352658U (en) | 2023-01-20 |
Family
ID=84918669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222459905.8U Active CN218352658U (en) | 2022-09-16 | 2022-09-16 | Power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218352658U (en) |
-
2022
- 2022-09-16 CN CN202222459905.8U patent/CN218352658U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8396233B2 (en) | Beam forming in spatialized audio sound systems using distributed array filters | |
| US6529787B2 (en) | Multimedia computer speaker system with bridge-coupled subwoofer | |
| JP4949208B2 (en) | Speech processing system | |
| WO2016141781A1 (en) | Integrated intelligent acoustic system | |
| CN111669683B (en) | Managing low frequency components of audio signals on a mobile computing device | |
| CN218352658U (en) | Power amplifier | |
| KR100861162B1 (en) | Stereo/monaural switching circuit and integrated circuit having the same | |
| KR102057320B1 (en) | Headphone driver reducing pop and click noise and system on chip having the same | |
| WO2011034520A1 (en) | System and method for modifying an audio signal | |
| CN102196338A (en) | Loudspeaking system and control method thereof | |
| JP2019087821A (en) | Audio circuit, on-vehicle audio device using the same, audio component device and electronic apparatus | |
| CN113721753A (en) | Power amplifier control method and apparatus, storage medium, and electronic device | |
| CN218240722U (en) | Audio transmission circuit | |
| JP3896810B2 (en) | Control equipment | |
| US8625820B2 (en) | Amplifier circuit audio circuit and electronic device | |
| CN103001588A (en) | Dynamic sound source amplifying circuit and method thereof | |
| CN113825067B (en) | Audio power amplifier driving circuit, circuit control method and device | |
| EP3869323A1 (en) | Control device and program recording medium | |
| CN218450497U (en) | Remote control system and platform of audio power amplifier | |
| CN111556405B (en) | Power amplifier chip and electronic equipment | |
| JP3975233B2 (en) | Audio equipment and audio output control method | |
| WO2024082388A1 (en) | Driving circuit for audio power amplifier, and electronic device | |
| KR101703018B1 (en) | Sound control system in the high performance directional loudspeaker using array system | |
| CN113810829A (en) | Method and apparatus for processing audio signal | |
| EP3196757B1 (en) | Control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |