CN206517428U - A kind of quantum key dispatching system - Google Patents
A kind of quantum key dispatching system Download PDFInfo
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- CN206517428U CN206517428U CN201720221832.5U CN201720221832U CN206517428U CN 206517428 U CN206517428 U CN 206517428U CN 201720221832 U CN201720221832 U CN 201720221832U CN 206517428 U CN206517428 U CN 206517428U
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- polarization
- beam splitter
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Abstract
A kind of quantum key dispatching system, including transmitting terminal and receiving terminal, the transmitting terminal includes transmitting terminal driving plate, signal laser, synchronous laser, intensity modulator, polarization-maintaining beam splitter, the first adjustable attenuator, the second adjustable attenuator and transmitting terminal wavelength division multiplexer, the receiving terminal includes receiving terminal driving plate, receiving terminal wavelength division multiplexer, synchroprobe, polarization beam apparatus, polarization-maintaining beam splitter and single-photon detector, and the receiving terminal wavelength division multiplexer connects transmitting terminal wavelength division multiplexer by quantum channel.Compared with prior art, the utility model in receiving terminal by increasing a polarization beam apparatus, flashlight is decomposed into two vertical polarization states, the interference under respective polarization state is completed using polarization maintaining optical fibre interference ring, obtain preferable result of interference, deviation-rectifying system has been abandoned simultaneously, the lengthy and jumbled degree of system has been simplified, also reduces production cost.
Description
Technical field
The utility model is related to optical transport safety communication technology field, more particularly to a kind of quantum key dispatching system.
Background technology
With a wide range of popularization of internet, the information transmission between the mankind has reached unprecedented quantity and frequency,
Various privacy informations expose on the internet more and more, and therefore, the mankind have also arrived unprecedented to the demand of secret communication
Height.The cipher mode of present internet information safety is referred to as " public-key cryptography " cryptosystem, and its principle is by encryption
The public-key cryptography propagated on algorithm, generation network, and the private key of computer-internal is stayed in, two keys must coordinate and make
With complete encryption and decryption processes could be realized.
The encryption standard that modern the Internet is used is the RSA Algorithm being born 1970s, i.e., using matter several greatly because
Son, which is decomposed, to be difficult to calculate to ensure the security of key.
Quantum-key distribution is that physicist Bennett in 1984 and cryptologist Brassard are proposed based on quantum force
The BB84 agreements of measuring principle are learned, quantum-key distribution can fundamentally ensure that the security of key.
Quantum key produces flashlight in transmitting terminal in the prior art, by traditional quantum channel transmitting procedure, by
In by the effect such as fiber channel birefringence, its polarization state is more big changes, and is influenceed the interference effect in optical signal later stage, can be made
The loss of integral key, at present, can increase deviation-rectifying system, by deviation-rectifying system come also to solve the above problems in receiving terminal
The polarization state of former optical signal, but deviation-rectifying system needs complicated hardware and software section composition, to whole encryption key distribution system
System brings the complexity of total system and improves production cost.
Utility model content
The utility model purpose is to provide a kind of quantum key dispatching system and method, with solve in the prior art in order to
Solution flashlight transmits the problem of polarization state changes in quantum channel to increase deviation-rectifying system in receiving terminal, pass through deviation-rectifying system
To reduce the polarization state of optical signal, but deviation-rectifying system needs complicated hardware and software section composition, to whole key point
Match system brings the complexity of total system and improves the technical bug of production cost.
What the technical solution of the utility model was realized in：
A kind of quantum key dispatching system, including transmitting terminal and receiving terminal, the transmitting terminal are believed with receiving terminal by quantum
Road is connected, and the transmitting terminal includes transmitting terminal driving plate, signal laser, synchronous laser, intensity modulator, the first polarization-maintaining point
Beam device, the second polarization-maintaining beam splitter, the first adjustable attenuator, the second adjustable attenuator and transmitting terminal wavelength division multiplexer, the letter
Number laser is sequentially connected intensity modulator, the first polarization-maintaining beam splitter, the second polarization-maintaining beam splitter, the first adjustable attenuator and hair
End wavelength division multiplexer is penetrated, the synchronous laser is sequentially connected the second adjustable attenuator and transmitting terminal wavelength division multiplexer, described
First adjustable attenuator is connected same one end of transmitting terminal wavelength division multiplexer, first polarization-maintaining beam splitter with the second adjustable attenuator
It is connected, is connected in the long-armed polarization maintaining optical fibre with the second polarization-maintaining beam splitter by long-armed polarization maintaining optical fibre and galianconism polarization maintaining optical fibre respectively
Phase regulator is connected to, transmitting terminal driving plate connects signal laser, intensity modulator, phase regulator, synchronous laser respectively
Device, the first adjustable attenuator and the second adjustable attenuator；
The receiving terminal includes receiving terminal driving plate, receiving terminal wavelength division multiplexer, synchroprobe, polarization beam apparatus, the
Three polarization-maintaining beam splitters, the 4th polarization-maintaining beam splitter and single-photon detector, the receiving terminal wavelength division multiplexer pass through quantum channel
Transmitting terminal wavelength division multiplexer is connected, the other end of the receiving terminal wavelength division multiplexer connects synchroprobe and polarization beam splitting respectively
Device, the polarization beam apparatus is sequentially connected the 3rd polarization-maintaining beam splitter and the 4th polarization-maintaining beam splitter, the 3rd polarization-maintaining beam splitter point
It is not connected, is connected in the long-armed polarization maintaining optical fibre with the 4th polarization-maintaining beam splitter by long-armed polarization maintaining optical fibre and galianconism polarization maintaining optical fibre
There are phase regulator, the other end connection single-photon detector of the 4th polarization-maintaining beam splitter, the receiving terminal driving plate difference
Connect synchroprobe, phase regulator and single-photon detector.
Preferably, the quantum channel is single-mode fiber.
Preferably, the receiving terminal also includes the 5th polarization-maintaining beam splitter and the 6th polarization-maintaining beam splitter, the polarization beam splitting
Device is sequentially connected the 5th polarization-maintaining beam splitter and the 6th polarization-maintaining beam splitter, and the 5th polarization-maintaining beam splitter passes through long-armed polarization-maintaining respectively
Optical fiber and galianconism polarization maintaining optical fibre are connected with the 6th polarization-maintaining beam splitter, and phase regulator is connected with the long-armed polarization maintaining optical fibre,
The other end of 6th polarization-maintaining beam splitter is connected with single-photon detector.
Preferably, the transmitting terminal also includes depolarizer, and the depolarizer is arranged on the second polarization-maintaining beam splitter and
Between one adjustable attenuator.
The utility model additionally provides a kind of quantum key distribution method, comprises the following steps：
1) laser is triggered：Transmitting terminal distinguishes trigger signal laser and synchronous laser hair using same clock signal
Project flashlight and synchronizable optical, the flashlight as modulation light, the synchronizable optical as synchronous transmission of signal to receiving terminal by
Synchroprobe response is used in receiving terminal；
2) state modulation is inveigled：The flashlight of signal laser transmitting carries out random strength modulation by intensity modulator, into
For signal state, inveigle state or vacuum state；
3) transmitting terminal is interfered：The unequal arm MZ interference made using polarization-maintaining beam splitter, flashlight passes through polarization-maintaining beam splitter point
Into two pulses, wherein all the way by long-armed, it is long-armed in added with phase-modulator, random phase modulation is carried out to flashlight, it is short
Arm does not do phase-modulation；
4) automatically controlled adjustable attenuator is decayed to flashlight：Flashlight decays light pulse by the first adjustable attenuator
To single photon magnitude, synchronizable optical adjusts synchronizable optical the strength range that can be responded to receiving terminal by the second adjustable attenuator；
5) flashlight and synchronizable optical throughput subchannel transmission：The different flashlight of wavelength and synchronizable optical are passed through in transmitting terminal
Cross transmitting terminal wavelength division multiplexer and be incorporated into a transmission, and decomposed again by receiving terminal wavelength division multiplexer in receiving terminal；
6) polarization beam apparatus beam splitting：The light of asynchronous polarization is decomposed into horizontal polarization direction by polarization beam apparatus and hung down
Straight polarization direction；
7) receiving terminal is interfered：The unequal arm MZ interference equal with transmitting terminal arm length difference is made using the 3rd polarization-maintaining beam splitter
Ring, flashlight is divided into two pulses by polarization-maintaining beam splitter, wherein all the way by long-armed, it is long-armed in added with phase-modulator, it is right
Flashlight carries out random phase modulation, and galianconism is not modulated；
8) single-photon detector is detected：Single-photon detector detects optical signals, and safe key is produced for subsequent treatment.
Preferably, the step 3) in, random 4 phase-modulation, respectively 0, pi/2, π, 3 pi/2s are carried out to flashlight；Step
7) random 2 phase-modulation, respectively 0, pi/2 are carried out to flashlight in.
Preferably, the step 7) in also include interfere all the way in addition, utilize the 5th polarization-maintaining beam splitter making and transmitting terminal
The equal unequal arm MZ interference rings of arm length difference, flashlight is divided into two pulses by polarization-maintaining beam splitter, wherein pass through long-armed all the way,
Added with phase-modulator in long-armed, random phase modulation is carried out to flashlight, galianconism is not modulated.
Compared with prior art, the utility model has following beneficial effect：
Quantum key dispatching system of the present utility model, by increasing a polarization beam apparatus in receiving terminal, by flashlight
Two vertical polarization states are decomposed into, the interference under respective polarization state is completed using polarization maintaining optical fibre interference ring, is preferably done
Result is related to, it is to avoid influence of the birefringence effect influence polarization state to result of interference in optical fiber transmitting procedure, while abandon
Deviation-rectifying system, simplifies the lengthy and jumbled degree of system, also reduces production cost.
Brief description of the drawings
Fig. 1 is the theory diagram of the utility model quantum key dispatching system；
Fig. 2 is the flow chart of the utility model quantum key distribution method.
In figure：Transmitting terminal 1, transmitting terminal driving plate 101, signal laser 102, synchronous laser 103, intensity modulator
104, the first polarization-maintaining beam splitter 105, the second polarization-maintaining beam splitter 106, the first adjustable attenuator 107, the second adjustable attenuator 108,
Transmitting terminal wavelength division multiplexer 109, depolarizer 110, receiving terminal 2 is receiving terminal driving plate 201, receiving terminal wavelength division multiplexer 202, same
Walk detector 203, polarization beam apparatus 204, the 3rd polarization-maintaining beam splitter 205, the 4th polarization-maintaining beam splitter 206 and single-photon detector
207, the 5th polarization-maintaining beam splitter 208, the 6th polarization-maintaining beam splitter 209, quantum channel 3, phase regulator 4.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the utility model is clearly and completely described.
As shown in Figure 1 to Figure 2, a kind of quantum key dispatching system, including transmitting terminal 1 and receiving terminal 2, the transmitting terminal 1
It is connected with receiving terminal 2 by quantum channel 3, the transmitting terminal 1 includes transmitting terminal driving plate 101, signal laser 102, synchronization
Laser 103, intensity modulator 104, the first polarization-maintaining beam splitter 105, the second polarization-maintaining beam splitter 106, the first adjustable attenuator
107th, the second adjustable attenuator 108 and transmitting terminal wavelength division multiplexer 109, the signal laser 102 are sequentially connected intensity tune
Device 104 processed, the first polarization-maintaining beam splitter 105, the second polarization-maintaining beam splitter 106, the first adjustable attenuator 107 and transmitting terminal wavelength-division are multiple
With device 109, the synchronous laser 103 is sequentially connected the second adjustable attenuator 108 and transmitting terminal wavelength division multiplexer 109, institute
State same one end that the first adjustable attenuator 107 is connected transmitting terminal wavelength division multiplexer 109 with the second adjustable attenuator 108, described
One polarization-maintaining beam splitter 105 is connected by long-armed polarization maintaining optical fibre and galianconism polarization maintaining optical fibre with the second polarization-maintaining beam splitter 106 respectively, institute
State and phase regulator 4 is connected with long-armed polarization maintaining optical fibre, transmitting terminal driving plate 101 connects signal laser 102, intensity and adjusted respectively
Device 104 processed, phase regulator 4, synchronous laser 103, the first adjustable attenuator 107 and the second adjustable attenuator 108, it is described
Phase regulator 4 and intensity modulator 104, the first adjustable attenuator 107, the second adjustable attenuator 108 of the part of transmitting terminal 1
Transmitting terminal driving plate 101 is connected by analog control signal line respectively, the signal laser 102, synchronous laser 103 are distinguished
Transmitting terminal driving plate 101 is connected by digital controlled signal line；The receiving terminal 2 includes receiving terminal driving plate 201, receiving terminal ripple
Division multiplexer 202, synchroprobe 203, polarization beam apparatus 204, the 3rd polarization-maintaining beam splitter 205, the 4th polarization-maintaining beam splitter 206 with
And single-photon detector 207, the receiving terminal wavelength division multiplexer 202 pass through quantum channel 3 connect transmitting terminal wavelength division multiplexer
109, the other end of the receiving terminal wavelength division multiplexer 109 connects synchroprobe 203 and polarization beam apparatus 204 respectively, described
Polarization beam apparatus 204 is sequentially connected the 3rd polarization-maintaining beam splitter 205 and the 4th polarization-maintaining beam splitter 206, the 3rd polarization-maintaining beam splitter
205 are connected by long-armed polarization maintaining optical fibre and galianconism polarization maintaining optical fibre with the 4th polarization-maintaining beam splitter 206 respectively, the long-armed polarization-maintaining light
Phase regulator 4 is connected with fibre, the other end connection single-photon detector 207 of the 4th polarization-maintaining beam splitter 206 is described to connect
Receiving end driving plate 201 connects synchroprobe 203, phase regulator 4 and single-photon detector 207, the receiving terminal 2 respectively
Partial phase regulator 4 connects receiving terminal driving plate 201 by analog control signal line.In the present embodiment, the quantum letter
Road is single-mode fiber, if quantum channel distance need not be long, also can be using polarization maintaining optical fibre transmission, to increase signal light polarization
The stability of state.The receiving terminal also includes the 5th polarization-maintaining beam splitter 208 and the 6th polarization-maintaining beam splitter 209, the polarization point
Beam device 204 is sequentially connected the 5th polarization-maintaining beam splitter 208 and the 6th polarization-maintaining beam splitter 209,208 points of the 5th polarization-maintaining beam splitter
It is not connected by long-armed polarization maintaining optical fibre and galianconism polarization maintaining optical fibre with the 6th polarization-maintaining beam splitter 209, in the long-armed polarization maintaining optical fibre
Phase regulator 4 is connected with, the other end of the 6th polarization-maintaining beam splitter 209 is connected with single-photon detector 207, wherein, institute
The 3rd polarization-maintaining beam splitter 205 and the 4th polarization-maintaining beam splitter 206 is stated to protect by long-armed polarization maintaining optical fibre and galianconism with phase regulator 4
Polarisation fibre forms an interference ring, and the 5th polarization-maintaining beam splitter 208 and the 6th polarization-maintaining beam splitter 209 lead to phase regulator 4
Cross long-armed polarization maintaining optical fibre and galianconism polarization maintaining optical fibre forms an other interference ring, two articles of interference rings are separately positioned on described
Three polarization-maintaining beam splitters 205 and the 4th polarization-maintaining beam splitter 206 pass through long-armed polarization maintaining optical fibre and galianconism polarization-maintaining light with phase regulator 4
Fibre forms the output end of an interference ring, and the transmitting terminal 1 also includes depolarizer 110, and the depolarizer 110 is arranged on second
Between the adjustable attenuator 107 of polarization-maintaining beam splitter 106 and first, the degree of polarization of flashlight can be reduced to 0 by the depolarizer 110,
So that the polarization state of flashlight is nature light state, the security that system transmits key is effectively guaranteed.
The utility model additionally provides a kind of quantum key distribution method, and the distribution method can be based on above-mentioned quantum key point
Match system is realized, is comprised the following steps：
1) laser is triggered：Transmitting terminal distinguishes trigger signal laser and synchronous laser hair using same clock signal
Project flashlight and synchronizable optical, the flashlight as modulation light, the synchronizable optical as synchronous transmission of signal to receiving terminal by
Synchroprobe response is used in receiving terminal；
2) state modulation is inveigled：The flashlight of signal laser transmitting carries out random strength modulation by intensity modulator, into
For signal state, inveigle state or vacuum state；
3) transmitting terminal is interfered：The unequal arm MZ interference made using polarization-maintaining beam splitter, flashlight passes through polarization-maintaining beam splitter point
Into two pulses, wherein all the way by long-armed, it is long-armed in added with phase-modulator, random phase modulation is carried out to flashlight, it is short
Arm does not do phase-modulation；
4) automatically controlled adjustable attenuator is decayed to flashlight：Flashlight decays light pulse by the first adjustable attenuator
To single photon magnitude, synchronizable optical adjusts synchronizable optical the strength range that can be responded to receiving terminal by the second adjustable attenuator；
5) flashlight and synchronizable optical throughput subchannel transmission：The different flashlight of wavelength and synchronizable optical are passed through in transmitting terminal
Cross transmitting terminal wavelength division multiplexer and be incorporated into a transmission, and decomposed again by receiving terminal wavelength division multiplexer in receiving terminal；
6) polarization beam apparatus beam splitting：The light of asynchronous polarization is decomposed into horizontal polarization direction by polarization beam apparatus and hung down
Straight polarization direction；
7) receiving terminal is interfered：The unequal arm MZ interference equal with transmitting terminal arm length difference is made using the 3rd polarization-maintaining beam splitter
Ring, flashlight is divided into two pulses by polarization-maintaining beam splitter, wherein all the way by long-armed, it is long-armed in added with phase-modulator, it is right
Flashlight carries out random phase modulation, and galianconism is not modulated；
8) single-photon detector is detected：Single-photon detector detects optical signals, and safe key is produced for subsequent treatment.
The step 3) in, random 4 phase-modulation, respectively 0, pi/2, π, 3 pi/2s are carried out to flashlight；Step 7) in it is right
Flashlight carries out random 2 phase-modulation, respectively 0, pi/2, step 3) in can also be as needed to a variety of phases of flashlight progress
Position modulation.The step 7) in also include interfere all the way in addition, utilize the 5th polarization-maintaining beam splitter making and transmitting terminal arm length difference phase
Deng unequal arm MZ interference rings, flashlight is divided into two pulses by polarization-maintaining beam splitter, wherein all the way by long-armed, it is long-armed in plus
There is phase-modulator, random phase modulation is carried out to flashlight, galianconism is not modulated.
Quantum key dispatching system of the present utility model, by increasing a polarization beam apparatus in receiving terminal, by flashlight
Two vertical polarization states are decomposed into, the interference under respective polarization state is completed using polarization maintaining optical fibre interference ring, is preferably done
Result is related to, it is to avoid influence of the birefringence effect influence polarization state to result of interference in optical fiber transmitting procedure, while abandon
Deviation-rectifying system, simplifies the lengthy and jumbled degree of system, also reduces production cost.
Claims (4)
1. a kind of quantum key dispatching system, it is characterised in that：Including transmitting terminal and receiving terminal, the transmitting terminal leads to receiving terminal
Quantum channel connection is crossed, the transmitting terminal includes transmitting terminal driving plate, signal laser, synchronous laser, intensity modulator, the
One polarization-maintaining beam splitter, the second polarization-maintaining beam splitter, the first adjustable attenuator, the second adjustable attenuator and transmitting terminal wavelength-division multiplex
Device, the signal laser is sequentially connected intensity modulator, the first polarization-maintaining beam splitter, the second polarization-maintaining beam splitter, first adjustable declined
Subtract device and transmitting terminal wavelength division multiplexer, the synchronous laser is sequentially connected the second adjustable attenuator and transmitting terminal wavelength-division is multiple
With device, first adjustable attenuator is connected same one end of transmitting terminal wavelength division multiplexer, described first with the second adjustable attenuator
Polarization-maintaining beam splitter is connected by long-armed polarization maintaining optical fibre and galianconism polarization maintaining optical fibre with the second polarization-maintaining beam splitter respectively, the long-armed guarantor
Phase regulator is connected with during polarisation is fine, transmitting terminal driving plate connects signal laser, intensity modulator, phase adjusted respectively
Device, synchronous laser, the first adjustable attenuator and the second adjustable attenuator；
The receiving terminal includes receiving terminal driving plate, receiving terminal wavelength division multiplexer, synchroprobe, polarization beam apparatus, the 3rd guarantor
Inclined beam splitter, the 4th polarization-maintaining beam splitter and single-photon detector, the receiving terminal wavelength division multiplexer are connected by quantum channel
Transmitting terminal wavelength division multiplexer, the other end of the receiving terminal wavelength division multiplexer connects synchroprobe and polarization beam apparatus respectively,
The polarization beam apparatus is sequentially connected the 3rd polarization-maintaining beam splitter and the 4th polarization-maintaining beam splitter, and the 3rd polarization-maintaining beam splitter leads to respectively
Cross long-armed polarization maintaining optical fibre and galianconism polarization maintaining optical fibre is connected with the 4th polarization-maintaining beam splitter, phase is connected with the long-armed polarization maintaining optical fibre
Position adjuster, the other end connection single-photon detector of the 4th polarization-maintaining beam splitter, the receiving terminal driving plate is connected respectively
Synchroprobe, phase regulator and single-photon detector.
2. quantum key dispatching system as claimed in claim 1, it is characterised in that the quantum channel is single-mode fiber.
3. quantum key dispatching system as claimed in claim 2, it is characterised in that the receiving terminal also includes the 5th polarization-maintaining point
Beam device and the 6th polarization-maintaining beam splitter, the polarization beam apparatus are sequentially connected the 5th polarization-maintaining beam splitter and the 6th polarization-maintaining beam splitting
Device, the 5th polarization-maintaining beam splitter is connected by long-armed polarization maintaining optical fibre and galianconism polarization maintaining optical fibre and the 6th polarization-maintaining beam splitter respectively
Connect, phase regulator is connected with the long-armed polarization maintaining optical fibre, the other end of the 6th polarization-maintaining beam splitter is connected with single photon
Detector.
4. quantum key dispatching system as claimed in claim 1, it is characterised in that the transmitting terminal also includes depolarizer,
The depolarizer is arranged between the second polarization-maintaining beam splitter and the first adjustable attenuator.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720221832.5U CN206517428U (en) | 2017-03-08 | 2017-03-08 | A kind of quantum key dispatching system |
| PCT/CN2018/074252 WO2018161733A1 (en) | 2017-03-08 | 2018-01-26 | Quantum key distribution system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720221832.5U CN206517428U (en) | 2017-03-08 | 2017-03-08 | A kind of quantum key dispatching system |
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| Publication Number | Publication Date |
|---|---|
| CN206517428U true CN206517428U (en) | 2017-09-22 |
Family
ID=59870134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720221832.5U Withdrawn - After Issue CN206517428U (en) | 2017-03-08 | 2017-03-08 | A kind of quantum key dispatching system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206517428U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106850213A (en) * | 2017-03-08 | 2017-06-13 | 浙江九州量子信息技术股份有限公司 | A kind of quantum key dispatching system and method |
| WO2018161733A1 (en) * | 2017-03-08 | 2018-09-13 | 浙江九州量子信息技术股份有限公司 | Quantum key distribution system and method |
-
2017
- 2017-03-08 CN CN201720221832.5U patent/CN206517428U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106850213A (en) * | 2017-03-08 | 2017-06-13 | 浙江九州量子信息技术股份有限公司 | A kind of quantum key dispatching system and method |
| WO2018161733A1 (en) * | 2017-03-08 | 2018-09-13 | 浙江九州量子信息技术股份有限公司 | Quantum key distribution system and method |
| CN106850213B (en) * | 2017-03-08 | 2023-08-25 | 浙江九州量子信息技术股份有限公司 | Quantum key distribution system and method |
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| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Song Xiaotian Inventor after: Ye Zhining Inventor before: Song Xiaotian Inventor before: Zhao Yibo Inventor before: Ye Zhining |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20170922 Effective date of abandoning: 20230825 |