CN209696025U - A kind of manual pulse oxygen supply device - Google Patents
A kind of manual pulse oxygen supply device Download PDFInfo
- Publication number
- CN209696025U CN209696025U CN201822257121.0U CN201822257121U CN209696025U CN 209696025 U CN209696025 U CN 209696025U CN 201822257121 U CN201822257121 U CN 201822257121U CN 209696025 U CN209696025 U CN 209696025U
- Authority
- CN
- China
- Prior art keywords
- oxygen supply
- signal
- oxygen
- manual
- mcu module
- 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
Landscapes
- Respiratory Apparatuses And Protective Means (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Abstract
The utility model discloses a kind of manual pulse oxygen supply devices, including power supply, MCU module, oxygen supply solenoid valve module, manual switch and the indicator light of pulse output；The connection of the power pins of power supply and MCU module；The oxygen supply signal output end of MCU module is connect with the signal input part of oxygen supply solenoid valve module, and the signal output end for supplying oxygen solenoid valve module is connected with oxygen air inlet and air outlet；The indicator light signal output end of MCU module and the signal input part of indicator light connect；The manual switch and the detection signal pins connection of the switch of MCU module；Above-mentioned apparatus of oxygen supply, the setting being operated with manual switches, using manual triggering breath signal, by acquisition three or more trigger signals, recycles MCU module to handle manual trigger signal, predict the time point of next breathing, automatic release trigger signal, oxygen is released by driving oxygen supply solenoid valve module, while amendment is synchronized to signal again in use, is achieved the effect that and synchronized with breath.
Description
Technical field
The utility model relates to oxygenerator technical field, specially a kind of manual pulse oxygen supply device.
Background technique
Pulse oxygenerator is with its efficient oxygen utilization efficiency, outdoors or mobile context, and reduces oxygen and uses
It is had been widely used in terms of cost.But respiration transducer detection user of service is usually used in existing pulse oxygenerator
Respiration information, then transmit a signal to driving device provide oxygen.But current respiration transducer is there are at high cost, it can
Few, main or pressure sensor first, micro flow sensor etc..These sensors are using complexity, and it is low to domesticize, with
For press detection sensor, that there are no domestic products is alternative for the sensor of high reliability at present.Another disadvantage precisely due to
Detection process height relies on sensor, and oxygen hose branch is connected on pressure sensor when installation, increases mounting process,
The reliability of oxygen hose is also reduced, and when oxygen inhaler improper use, it often can't detect breath signal, function caused to be lost
It loses, for example, when oxygen output pipe is bent, when oxygen hose gas leakage, when sensor consistency is made mistakes, is based on these features, not
Conducive to the universal of pulse oxygenerator and use.
Utility model content
Based on this, the utility model provides a kind of manual pulse oxygen supply device.
A kind of manual pulse oxygen supply device, including power supply, MCU module, oxygen supply solenoid valve module, manual switch and arteries and veins
Rush the indicator light of output；The connection of the power pins of the power supply and MCU module；
The oxygen supply signal output end of the MCU module is connect with the signal input part of oxygen supply solenoid valve module, the oxygen supply
The signal output end of solenoid valve module is connected with oxygen air inlet and air outlet；
The indicator light signal output end of the MCU module and the signal input part of indicator light connect；The manual switch with
The switch detection signal pins connection of MCU module.
The manual switch includes that mechanical switch, optical coupled switch, floor push, induction are opened in one of the embodiments,
At least one of pass, wireless switching.
The oxygen supply solenoid valve module includes driving unit, rectifier diode, oxygen supply control in one of the embodiments,
The oxygen supply signal output end of valve, MCU module is connected by the signal input part of first resistor and driving unit, the letter of driving unit
Number output end connect with oxygen supply control valve, for providing driving electric energy to oxygen supply control valve, rectifier diode with supply oxygen control valve
It is connected in parallel, the reverse potential that oxygen supply control valve generates when interrupting for offseting signal.
The oxygen supply solenoid valve module includes field-effect tube, high current triode, driving IC in one of the embodiments,
At least one of.
The model N76E003AT20 of the MCU module in one of the embodiments,.
The indicator light includes second resistance and light emitting diode, one end of second resistance in one of the embodiments,
It is connect with the indicator light signal output end of MCU module, the anode of the other end and light emitting diode connects, the cathode of light emitting diode
It is connect with earth polar.
The model B5819W of rectifier diode in one of the embodiments,.
A kind of above-mentioned manual pulse oxygen supply device, the setting being operated with manual switches are recycled using manual trigger signal
MCU module handles manual trigger signal, predicts the time point of next breathing, discharges trigger signal automatically, passes through drive
Dynamic oxygen supply solenoid valve module releases oxygen, and structure is simple, low in cost, avoids because can't detect breath signal, and leads
The problem of causing function failure occurs；And the present apparatus can arbitrarily can be implanted into existing system separately as a functional module
In oxygen machine, increase it by pulse function, expands application, improve the service efficiency of oxygen.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of manual pulse oxygen supply device of an embodiment of the present invention；
Fig. 2 is the pulse analysis figure of method for supplying oxygen of manual pulse oxygen supply device of an embodiment of the present invention a kind of and same
Step driving figure waveform diagram.
Specific embodiment
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing to this
The specific embodiment of utility model is described in detail.Many details are explained in the following description in order to abundant
Understand the utility model.But the utility model can be implemented with being much different from other way described herein, this field
Technical staff can do similar improvement without prejudice to the utility model connotation, therefore the utility model is not by following public affairs
The limitation for the specific embodiment opened.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be with
It is directly to another element or may be simultaneously present centering elements.Term as used herein " vertically ", " level
", "left", "right" and similar statement for illustrative purposes only, be not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein "and/or" packet
Include any and all combinations of one or more related listed items.
As shown in Figure 1, a kind of manual pulse oxygen supply device, including power supply 100, MCU module 200, oxygen supply solenoid valve
The indicator light 600 of module 300, manual switch 400 and pulse output；The power supply 100 and the power supply of MCU module 200 draw
Foot connection；
The oxygen supply signal output end of the MCU module 200 is connect with the signal input part of oxygen supply solenoid valve module 300, institute
The signal output end for stating oxygen supply solenoid valve module 300 is connected with oxygen air inlet and air outlet；
The indicator light signal output end of the MCU module 200 is connect with the signal input part of indicator light 600；It is described manual
Switch 400 is connect with the switch of MCU module 200 detection signal pins.
When needing oxygen uptake, manual switch 400 issues a trigger signal, when MCU module 200 detects manual switch
After 400 trigger signals issued, a driving signal is exported immediately and gives oxygen supply solenoid valve module 300, supplies oxygen solenoid valve module 300
The movement of oxygen air inlet and air outlet is driven, a certain amount of oxygen is exported.
It when there is duplicate trigger signal, is then analyzed, is predicted next by time of the MCU module 200 to trigger signal
The arrival in a burst length drives the movement of oxygen air inlet and air outlet by oxygen supply solenoid valve module 300, exports automatically a certain amount of
Oxygen.When being received again by 400 trigger signal of manual switch and receiving, then by 400 trigger signal of manual switch by MCU module
200 output drive signals are transferred to automatically if receiving 400 trigger signal of manual switch not yet in the section that is delayed
Autompulse function.
When apparatus of oxygen supply is in autompulse function, have received 400 trigger signal of manual switch, then apparatus of oxygen supply when
Between be synchronized with 400 trigger signal of manual switch immediately.
In this way, a kind of manual pulse oxygen supply device, is operated with manual switches 400 setting, using manual trigger signal, then benefit
Manual trigger signal is handled with MCU module 200, the time point of next breathing is predicted, discharges trigger signal automatically, is led to
It overdrives and supplies oxygen solenoid valve module 300 and release oxygen, structure is simple, and it is low in cost, it avoids because can't detect breathing letter
Number, and appearance the problem of cause function to fail；And the present apparatus can arbitrarily can be implanted into existing separately as a functional module
In some oxygenerators, increase it by pulse function, expands application, improve the service efficiency of oxygen.
Further, the manual switch 400 include mechanical switch, it is optical coupled switch, floor push, inductive switch, wireless
At least one of switch.
Further, the oxygen supply solenoid valve module 300 includes driving unit 302, rectifier diode 301, oxygen supply control
The oxygen supply signal output end of valve 303, MCU module 200 is connect by first resistor 201 with the signal input part of driving unit 302,
The signal output end of driving unit 302 is connect with oxygen supply control valve 303, whole for providing driving electric energy to oxygen supply control valve 303
Stream diode 301 is connected in parallel with oxygen supply control valve 303, and oxygen supply control valve 303 generates reversed when interrupting for offseting signal
Potential.
After MCU module 200 receives the trigger signal of manual switch 400, by first resistor 201 send driving signal to
Driving unit 302, driving unit 302 send driving signal and give oxygen supply control valve 303, and oxygen supply control valve 303 controls oxygen air inlet
Mouth and gas outlet output oxygen are for people to use.
In this way, MCU module 200 is opened or closed by controlling driving unit 302, to control opening for oxygen supply control valve 303
It opening or closes, oxygen air inlet and air outlet is made to export oxygen, structure is simple, and it is easy to use, meanwhile, rectifier diode 301
Setting, it is effective to protect oxygen supply control valve 303, extend the service life of component.
Further, the oxygen supply solenoid valve module 300 includes field-effect tube, high current triode, drives in IC extremely
Few one kind.
Further, the model N76E003AT20 of the MCU module 200.
Further, the indicator light 600 include second resistance 602 and light emitting diode 601, the one of second resistance 602
End is connect with the indicator light signal output end of MCU module 200, and the other end is connect with the anode of light emitting diode 601, light-emitting diodes
The cathode of pipe 601 is connect with earth polar.
In this way, light emitting diode 601 shines when MCU module 200 sends driving signal to oxygen supply solenoid valve module 300,
Prompt user has oxygen output, so that user can timely use, avoids waste.
Further, the model B5819W of light emitting diode 301.
Power supply 100 includes: voltage stabilizing chip 101,3rd resistor 102, the 4th resistance 103, the 5th resistance 105, first
Capacitor 104, the second capacitor 106, third capacitor 107,101 signal input part of voltage stabilizing chip are connect with external power supply, signal output
End connect with the pin VDD of MCU module 200, is that MCU module 200 provides the supply voltage of 5V, one end of 3rd resistor 102 and
Points of common connection connection between the signal output end of voltage stabilizing chip 101 and the pin VDD of MCU module 200, the other end and the 4th
One end of resistance 103 connects, and the other end of the 4th resistance 103 is connect with earth polar, first capacitor 104 and 3rd resistor 102 and the
Four resistance 103 are connected in parallel, one end and the signal output end of voltage stabilizing chip 101 and the drawing for MCU module 200 of the 5th resistance 105
Points of common connection connection between foot VDD, the other end connect with one end of the second capacitor 106, the other end of the second capacitor 106 and
Earth polar connection, third capacitor 107 are connected in parallel in circuit.
Further, MCU module 200 further includes the 6th resistance 202, one end and the MCU module 200 of the 6th resistance 202
Pin P1.4 connection, the other end are connect with 5V power supply.
As shown in Fig. 2, a kind of method for supplying oxygen of manual pulse oxygen supply device,
Step 1: 200 electrifying startup of MCU module, MCU module 200 resets, and plug-in starting waits manual switch 400
Signal input；
Step 2: user triggers manual switch with the synchronized with breath of itself, and the breathing of itself is followed to issue at least three
A manual trigger signal；
Step 3: MCU module 200 receives manual trigger signal and records the triggered time；
Step 4: MCU module 200 drives oxygen supply solenoid valve module 300 to discharge oxygen according to manual trigger signal；
Step 5: MCU module 200 calculates the time difference in latter triggered time and previous triggered time and obtains at least two
First time difference；
Step 6: calculating the weighted average of at least two first time differences and saving as the first interval time；
Step 7: MCU module 200 drives oxygen supply solenoid valve module 300 release oxygen automatically according to the first interval time；
It receives at least two manual trigger signals step 8: MCU module 200 is spaced again and records the triggered time；
Step 9: MCU module 200 recalculates the time difference in latter triggered time and previous triggered time and obtains at least
One the second time difference；
Step 10: when calculating the second time difference and the weighted average of the first interval time and saving as the second interval
Between；
Step 11: MCU module 200 drives oxygen supply solenoid valve module 300 release oxygen automatically according to the second interval time；
Step 12:, if being received again by manual trigger signal, being repeated during MCU module discharges oxygen automatically
The 8th step is stated to act to the 11st step.
Such as: when user, which triggers manual switch 400, inputs first switch triggering signal, the response of MCU module 200 two
A movement, first element are to export control signal immediately to give oxygen supply solenoid valve module 300, and oxygen supply solenoid valve module 300 discharges
Oxygen out；Second movement is to record current time point A, waits second manual trigger signal；
When manual switch 400 inputs second switch triggering signal, MCU module 200 responds three movements, and first dynamic
Work is to export control signal immediately to give oxygen supply solenoid valve module 300, and oxygen supply solenoid valve module 300 releases oxygen；Second dynamic
Work is the time difference calculated between first switch triggering signal, this time difference is recorded as t1；Third movement is will be current
Time point B record, wait third manual trigger signal；
When manual switch 400 inputs third switch triggering signal, MCU module 200 responds four movements, and first dynamic
Work is to export control signal immediately to give oxygen supply solenoid valve module 300, and oxygen supply solenoid valve module 300 releases oxygen, and second dynamic
Work is the time difference calculated between second switch triggering signal, this time difference is recorded as t2, and third movement is will be current
Time point C record, t1, t2 are two first time differences, and the 4th movement is the average value t for calculating t1 and t2,
And the first interval time t is preserved.
Calculation formula is t=(t1+t2)/2
Time t, MCU module 200 just automatically control oxygen supply solenoid valve module 300 and release oxygen at each interval later
Gas, until receiving 400 trigger signal of manual switch or shutdown again.
After calculating the first interval time t, it can not have to have manual trigger signal again, the first interval t is under predicting
The time cycle of one breathing.
MCU module 200 will be released by the interval output signal control oxygen supply solenoid valve module 300 of the first interval t automatically
Oxygen.
For example, the time point D in figure is automatic signal output point, time span T=t.
When MCU handles automatic output signal, if receiving 400 trigger signal of manual switch again, first element is vertical
That is synchronization output signal, the control oxygen supply solenoid valve module 300 of MCU module 200 releases oxygen, for example, should be defeated in time point F
Signal out, but when time point, E received manual trigger signal, then the first interval t restarts to calculate the time.
If being received again by 400 trigger signal of manual switch, three movements are immediately performed, first element is synchronous immediately
Output signal, the control oxygen supply solenoid valve module 300 of MCU module 200 release oxygen；Second movement be calculate with it is previous
Time difference between manual trigger signal, this time difference are recorded as the second time difference t3, recalculate the second interval time t',
Second interval time t' calculation method is:
T'=(t+t3)/2
If subsequent continuously receive 400 trigger signal of manual switch, new t is successively calculated according to the above method, and by new t's
Time cycle provides output signal, and oxygen supply solenoid valve module 300 is made to release oxygen.
Above-mentioned Cycle Averaging Method can be used according to the place of pulse oxygenerator to improve anti-interference or improving precision
Cycle Averaging Method more times, such as 5 times or more.
A kind of method for supplying oxygen of above-mentioned manual pulse oxygen supply device, is operated with manual switches 400 setting, using manual triggering
Signal recycles MCU module 200 to handle manual trigger signal, by acquisition three or more trigger signals, under prediction
The time point of one breathing, it is no longer necessary to which manual trigger signal discharges trigger signal automatically, and oxygen supply solenoid valve module 300 is released
Oxygen is avoided because of the problem of can't detect breath signal, and function is caused to fail appearance.
Further, whether first judge to supply oxygen solenoid valve module 300 before the 9th step in release oxygen, be to count again
Calculate the time difference of trigger signal.
When MCU handles automatic output signal, if receiving 400 trigger signal of manual switch again, first element is vertical
That is synchronization output signal, the control oxygen supply solenoid valve module 300 of MCU module 200 release oxygen, judge to supply oxygen solenoid valve module
Whether 300 begin to release oxygen before receiving manual trigger signal, it may be assumed that if currently outputed, supplies oxygen
Time restarts to calculate, i.e. the oxygen supply time that has exported of front is not counting within interval time；If it is in waiting time, then stand
That is the rule of output signal, output is constant.
Further, first judge whether the second time difference is effective before the tenth step, be, execute subsequent step.
When MCU handles automatic output signal, if minor tick receives at least two manual switches, 400 trigger signal again, and
The time difference of two trigger signals is calculated, this time is recorded as the second time difference t3, if t3 and the first interval time t error
Within preset threshold, such as error 20%, then it is assumed that when secondary manual switch trigger signal is useful signal, will count again
The second interval time t' is calculated, the second interval time t' calculation method is:
T'=(t+t3)/2
If the error of the second time difference t3 and the first interval time t are more than preset threshold, then it is assumed that when secondary manual
Trigger signal is invalid signals, and MCU module 200 thinks to have only received a nearest signal, and dropout before does not need
Recalculate the first interval time t.
It is above-mentioned in calculating cycle error, can be also adjusted according to user group feature.As 20% among the above can also subtract
It is small to 5%, also rise to 30%.
Since the utility model point of the present apparatus is manual pulse output, go out oxygen duration in the t in figure, such as out oxygen when
Long K, switchs duration t5, and breathing sense duration t4 will not be within this patent be related to, since pulse processing will inevitably encounter this
A problem marks be easy for understanding the embodiments of the present invention here.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (7)
1. a kind of manual pulse oxygen supply device, it is characterised in that: including power supply, MCU module, oxygen supply solenoid valve module, hand
Dynamic switch and the indicator light of pulse output；The connection of the power pins of the power supply and MCU module；
The oxygen supply signal output end of the MCU module is connect with the signal input part of oxygen supply solenoid valve module, the oxygen supply electromagnetism
The signal output end of valve module is connected with oxygen air inlet and air outlet；
The indicator light signal output end of the MCU module and the signal input part of indicator light connect；The manual switch and MCU mould
The switch detection signal pins connection of block.
2. a kind of manual pulse oxygen supply device according to claim 1, it is characterised in that: the manual switch includes machinery
At least one of switch, optical coupled switch, floor push, inductive switch, wireless switching.
3. a kind of manual pulse oxygen supply device according to claim 1, it is characterised in that: the oxygen supply solenoid valve module packet
Driving unit, rectifier diode, oxygen supply control valve are included, the oxygen supply signal output end of MCU module is single by first resistor and driving
The signal output end of the signal input part connection of member, driving unit is connect with oxygen supply control valve, for providing to oxygen supply control valve
Electric energy is driven, rectifier diode is connected in parallel with oxygen supply control valve, and oxygen supply control valve generates anti-when interrupting for offseting signal
To potential.
4. a kind of manual pulse oxygen supply device according to claim 3, it is characterised in that: the oxygen supply solenoid valve module packet
Include at least one of field-effect tube, high current triode, driving IC.
5. a kind of manual pulse oxygen supply device according to claim 1, it is characterised in that: the model of the MCU module
N76E003AT20。
6. a kind of manual pulse oxygen supply device according to claim 1, it is characterised in that: the indicator light includes the second electricity
Resistance and light emitting diode, one end of second resistance and the indicator light signal output end of MCU module connect, the other end and light-emitting diodes
The anode connection of pipe, the cathode of light emitting diode are connect with earth polar.
7. a kind of manual pulse oxygen supply device according to claim 4, it is characterised in that: the model of rectifier diode
B5819W。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822257121.0U CN209696025U (en) | 2018-12-29 | 2018-12-29 | A kind of manual pulse oxygen supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822257121.0U CN209696025U (en) | 2018-12-29 | 2018-12-29 | A kind of manual pulse oxygen supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209696025U true CN209696025U (en) | 2019-11-29 |
Family
ID=68638846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822257121.0U Active CN209696025U (en) | 2018-12-29 | 2018-12-29 | A kind of manual pulse oxygen supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209696025U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109646782A (en) * | 2018-12-29 | 2019-04-19 | 惠州市美亚飞电器有限公司 | A kind of manual pulse oxygen supply device and its method for supplying oxygen |
-
2018
- 2018-12-29 CN CN201822257121.0U patent/CN209696025U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109646782A (en) * | 2018-12-29 | 2019-04-19 | 惠州市美亚飞电器有限公司 | A kind of manual pulse oxygen supply device and its method for supplying oxygen |
| CN109646782B (en) * | 2018-12-29 | 2024-03-22 | 惠州市美亚飞电器有限公司 | Manual pulse oxygen supply device and application method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104300376B (en) | A kind of power switch cabinet multifunctional examining examining system and its implementation | |
| CN201569698U (en) | Zero-crossing signal detection device for air conditioner switching power supply | |
| CN209696025U (en) | A kind of manual pulse oxygen supply device | |
| CN104007709B (en) | Electrical device, and control device and control method thereof | |
| CN105277880A (en) | A switch device life test control system | |
| CN103913626B (en) | A kind of AC dump warning circuit for preventing direct current input from alerting by mistake | |
| CN104730365A (en) | Household appliance fault detecting device and method | |
| CN109646782A (en) | A kind of manual pulse oxygen supply device and its method for supplying oxygen | |
| CN106197901A (en) | Container tightness detecting and controlling system and detection device | |
| CN104658818A (en) | Relay drive circuit | |
| CN203042523U (en) | Medical negative-pressure suction machine | |
| CN101944689B (en) | Power supply plugboard device and control method thereof | |
| CN205563925U (en) | Indoor fire prevention and environmental monitoring system based on singlechip | |
| CN206096852U (en) | System for be used for refrigerator variable frequency electric control intergral template and display panel communication | |
| CN202075338U (en) | Ultralow power-consumption AC zero passage detection circuit | |
| CN206400059U (en) | Compressor fault indicating circuit based on refrigerator frequency conversion electrical control integrated board | |
| CN205210271U (en) | Switchgear life test control system | |
| CN104571085A (en) | Method for automatically testing on-off input and on-off output of light rail door control system | |
| CN202110253U (en) | Measuring device for measuring opening/closing time of breaker | |
| CN203494027U (en) | Automatic control oxygen supply device | |
| CN204043704U (en) | Humiture monitoring device | |
| CN207067268U (en) | A kind of display screen start test circuit and device | |
| CN201844474U (en) | Control circuit of warmer | |
| CN100360396C (en) | Fuzzy control method of ozone generating device | |
| CN206148980U (en) | Charger temperature control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |