EP2017794A1 - Verrouillage et clé électromécanique - Google Patents

Verrouillage et clé électromécanique Download PDF

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Publication number
EP2017794A1
EP2017794A1 EP07112675A EP07112675A EP2017794A1 EP 2017794 A1 EP2017794 A1 EP 2017794A1 EP 07112675 A EP07112675 A EP 07112675A EP 07112675 A EP07112675 A EP 07112675A EP 2017794 A1 EP2017794 A1 EP 2017794A1
Authority
EP
European Patent Office
Prior art keywords
validation
data
access
lock
state
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.)
Withdrawn
Application number
EP07112675A
Other languages
German (de)
English (en)
Inventor
Seppo Lohiniva
Mika Pukari
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iloq Oy
Original Assignee
Iloq Oy
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Iloq Oy filed Critical Iloq Oy
Priority to EP07112675A priority Critical patent/EP2017794A1/fr
Priority to PCT/FI2008/050434 priority patent/WO2009010637A1/fr
Publication of EP2017794A1 publication Critical patent/EP2017794A1/fr
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00896—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses
    • G07C9/00904—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses for hotels, motels, office buildings or the like
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00896—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses

Definitions

  • the invention relates to electromechanical locks.
  • Electromechanical locks are replacing the traditional mechanical locks. Electromechanical locks require an external supply of electric power, a battery inside the lock, a battery inside the key, or means for generating electric power within the lock making the lock user-powered. Electromechanical locks provide many benefits over traditional locks. They provide better security and the control of the keys or security tokens is easier.
  • an electromechanical lock comprising: a validation input configured to have two or more states; an electronic circuit configured to read access data from an external source; to read the state of the validation input, to determine validation data from the access data and a predetermined criterion, the validation data comprising information whether checking the validation input state is required; and to issue an open command provided that the access data matches a predetermined criterion; and the validation data matches the state of the validation input provided such a match was required; and an actuator to receive the open command, and to set the lock in a mechanically openable state.
  • a key for an electromechanical lock comprising: an electronic circuit configured to store access data with validation data indicating access groups the key belongs to and the access groups which require checking the state of the validation switch; and a contact arrangement to communicate with the electromechanical lock.
  • a method for operating an electromechanical lock comprising: reading access data from an external source; reading the state of a validation input; determining validation data from the access data and a predetermined criterion, the validation data comprising information whether checking the validation input state is required; matching the access data against a predetermined criterion; and the validation data against the state of the validation input provided such a match was required; issuing an open command a match or matches are found; setting the lock in a mechanically openable state in response to the open command.
  • an electromechanical lock comprising: input means configured to have two or more states; means for reading access data and validation data from an external source; means for reading the state of the input means, means for determining validation data from the access data and a predetermined criterion, the validation data comprising information whether checking the validation input state is required; and means for issuing an open command provided that the access data matches a predetermined criterion; and the validation data matches the state of the input means provided such a match was required; and means for receiving the open command, and setting the lock in a mechanically openable state.
  • the invention has several advantages.
  • the proposed solution minimizes the need to change lock data. In varying situations, necessary changes can be made to key data.
  • the usage of a validation input provides conditional access which does not require lock reprogramming.
  • Embodiments of the invention may be applied to electromechanical locks having an external power supply, a battery inside the lock or the key or user-powered electromechanical locks.
  • the lock 106 comprises an electronic circuit 112 configured to read access data from an external source 100, and match the data against a predetermined criterion.
  • the electronic circuit 112 may be implemented as one or more integrated circuits, such as application-specific integrated circuits ASICs.
  • Other embodiments are also feasible, such as a circuit built of separate logic components, or a processor with its software. A hybrid of these different embodiments is also feasible.
  • the external source 100 may be an electronic circuit configured to store the data.
  • the electronic circuit may be an iButton® (www.ibutton.com) of Maxim Integrated Products, for example; such an electronic circuit may be read with 1-Wire® protocol.
  • the electronic circuit may be placed in a key or a token, for example, but it may be positioned also in another suitable device or object.
  • the only requirement is that the electronic circuit 112 may read the data from the electronic circuit.
  • the data transfer from the electronic circuit to the electronic circuit 112 may be performed with any suitable wired or wireless communication technique. In user-powered locks, produced energy amount may limit the used techniques.
  • Magnetic stripe technology or smart card technology may also be used as the external source.
  • Wireless technologies may include RFID (Radio-frequency identification) technology, or mobile phone technology, for example.
  • the external source may be a transponder, an RF tag, or any other suitable memory type capable of storing data.
  • the data read from the external source is used for authentication by matching the data against the predetermined criterion.
  • the authentication may be performed with SHA-1 (Secure Hash Algorithm) function, designed by the National Security Agency (NSA).
  • SHA-1 Secure Hash Algorithm
  • a condensed digital representation (known as a message digest) is computed from a given input data sequence (known as the message).
  • the message digest is to a high degree of probability unique for the message.
  • SHA-1 is called "secure" because, for a given algorithm, it is computationally infeasible to find a message that corresponds to a given message digest, or to find two different messages that produce the same message digest. Any change to a message will, with a very high probability, result in a different message digest.
  • SHA-2 hash functions
  • SHA-2 hash functions
  • any suitable authentication technique may be used to authenticate the data read from the external source. The selection of the authentication technique depends on the desired security level of the lock 106 and possibly also on the permitted consumption of electricity for the authentication (especially in user-powered electromechanical locks).
  • Figure 1 shows an external source such as a key 100 comprising an electronic circuit 102 connected to a contact arrangement 104 and a key frame.
  • the electronic circuit 102 may comprise a memory unit.
  • the electromechanical lock 106 of Figure 1 is a user-powered lock.
  • the lock 106 comprises power transmission mechanics 120 which transforms mechanic energy from a user to an electric generator 108 powering the electronic circuit 112 when the key 100 is inserted into the lock 106.
  • the electronic circuit 112 is configured to communicate with the electronic circuit 102 of the key through a contact arrangement 116 and the contact arrangement 104 of the key.
  • the communication may be realized as a wireless connection or by physical conductivity.
  • the lock of Figure 1 further comprises a validation input 114.
  • the input is realized with a switch configured to have two states, '0' and '1'.
  • the switch may be realized with a push button, a level switch or a rotating switch. Also other realizations are possible as one skilled in the art is well aware.
  • the electronic circuit 112 is configured to read access data from the electronic circuit 102 of the key 100 upon the key insertion and read the state of the validation input 114.
  • the electronic circuit 112 is further configured to determine validation data from the access data and a predetermined criterion, the validation data comprising information whether checking the validation switch state is required, and to issue an open command provided that the access data matches a predetermined criterion and the validation data matches the state of the validation switch provided such a match was required.
  • the predetermined criterion may be stored in the electronic circuit as will be explained later.
  • the lock of Figure 1 further comprises an actuator 110 configured to receive the open command, and to set the lock in a mechanically openable state.
  • the actuator may be powered by the electric power produced with the generator 108.
  • the actuator 110 may be set to the locked state mechanically, but a detailed discussion thereon is not necessary to illuminate the present embodiments.
  • a bolt mechanism 118 can be moved by rotating the key 100, for example.
  • the mechanical power required may also be produced by the user by turning a handle or a knob of a door (not shown in Figure 1 ). Other suitable turning mechanisms may be used as well.
  • the electronic circuit 112 may be configured to recognize the following states: the lock is in the mechanically openable state; the lock is closed and the data read from the key does not match the predetermined criterion; and the lock is closed and there is not enough electric energy to read the data from the key and to check the match of the data by the electronic circuit or to place the lock in the mechanically openable state by the actuator.
  • the electronic circuit 112 may be configured to provide a signal for the key 100 if the open command is not issued because the data does not match the predetermined criterion, so that the key 100 may inform the user that the data did not match the predetermined criterion.
  • the electronic circuit 112 may be configured to provide electric power for the key 100.
  • An advantage of this is that the key 100 may inform the user with the electric power received from the electronic circuit 112.
  • the key 112 may inform the user with a visual or an audio indicator, for example.
  • Figure 2 illustrates another example of the structure of an electromechanical lock 106.
  • the lock 106 comprises a battery 200 which provides the electric power required for the operation of the lock.
  • the battery provides power for the electronic circuit 112 and the actuator 110.
  • the battery 200 provides electric power for the electronic circuit 102 of the key through the contact arrangement 116 of the lock and the contact arrangement 104 of the key.
  • the power transmission mechanics 120 and the electric generator 108 of Figure 1 are not required.
  • Figure 3 illustrates another example of the structure of an electromechanical lock 106.
  • the key 100 comprises a battery 300 which provides the electric power required for the operation of the key and the lock.
  • the battery 300 provides power for the electronic circuit 102 of the key.
  • the battery 300 provides power for the electronic circuit 112 and the actuator 110 of the lock through the contact arrangement 116 of the lock and the contact arrangement 104 of the key.
  • the power transmission mechanics 120 and the electric generator 108 of Figure 1 are not required.
  • Figures 4A and 4B illustrate examples of the realization of the validation input.
  • the validation input was realized with a simple two-state switching arrangement.
  • Figure 4A illustrates an example where three switches are used.
  • the signals S1, S2, S3 and COM may be connected to the electronic circuit 112.
  • the signals are active when contacts S1, S2, S3 are closed to COM.
  • the amount and type of switches may vary.
  • Figure 4B illustrates an example where control signals 1 and 2 are connected to lock input signals S1 and S2 through relays 400, 402.
  • key validation may be controlled by an external control system, such as a clock, an alarm system, an access control system, or a building automation system.
  • Figure 5A illustrates an example of an embodiment.
  • the figure illustrates an example of data stored in the electronic circuit 102 of an external device or a key 100 and in the electronic circuit 112 of the electromechanical lock.
  • the key and the electronic circuit 112 communicate through contact arrangements 104 and 116.
  • the electronic circuit 102 of key 100 stores a data structure 500 comprising a key ID or key identification 504 and an access group data with a validation data 506.
  • the key may store a security hash operation SHA-1 data 502.
  • the access group data comprises one or more access groups the key belongs to. In the example of Figure 5A , the key 102 belongs to four access groups, A, B, C, and D.
  • a key may open a lock if it belongs to an access group to which an access is allowed or if the key has a key identification ID to which an access is allowed.
  • Each key has a unique identification ID 504 which may be used to identify the key.
  • a key may be provided with several access groups to allow access to different locations. For example, the same key may provide access to an apartment (access group 1), a cellar (access group 2), a garage (access group 3), and a waste bin shelter (access group 4). A user may then provide a waste management company with a key comprising only the access group 4. Thus, the company may be provided an access to the waste bin shelter but the key does not authorize access to other parts of the building.
  • Each access group may be attached with validation data.
  • the validation data comprises information whether the state of the validation input 114 of the electromechanical lock 106 is to be checked when determining whether a key is allowed to open a lock.
  • the validation data may also comprise information about what is the desired state of the validation input.
  • the validation data may be expressed with one bit, having a value 'on' or 'off'.
  • the value 'off' indicates that the state of the validation input is not to be checked.
  • the value 'on' indicates that the state of the validation input is to be checked and it should be 'on'.
  • the validation data may indicate the desired value.
  • the value 'off' or '0' may indicate that the state of the validation input is not to be checked. Any other value may indicate that the state should be checked and it should match the value indicated by the validation data.
  • access groups A and D require checking the state of the validation input. Access groups B and C do not require such a check.
  • the electronic circuit 112 of the electromechanical lock 106 comprises a memory comprising fields 516, 518, 520 and 524.
  • the memory stores access group data 524, access identification data 516, blacklist data 518 and access log data 520.
  • the circuit may store SHA-1 operation data 512, and validation input data 510.
  • the electronic circuit 112 may comprise control logic 508 connected to the memory and to the contact arrangement 116.
  • the control logic 508 performs communication between the lock and the key and performs required data processing.
  • the control logic may issue an open command to the actuator 110.
  • the access group data 524 contains the access groups to which the lock allows access.
  • the electronic circuit 112 is configured to open the lock for keys belonging to access groups A, C, G, H and F provided that other required conditions match.
  • the access identification data 516 contains the identifications of the keys which may open the lock. Thus, a key with a suitable ID may be used to open a lock even if the key does not belong to any access group.
  • the electronic circuit 112 is configured to open the lock for keys having identifications 6, 9 and 22.
  • the blacklist data 518 contains the access groups and key identifications which may not open the lock even if other conditions are fulfilled.
  • the blacklist data may be used to block a key from an otherwise allowed access group. For example, if a user has lost a key, the identification of the lost key may be added to the blacklist data and the key will become useless.
  • the electronic circuit 112 is configured to block the access for keys having identifications 16, 19 and access group J.
  • the SHA-1 operation data 512 together with the respective data 502 stored in a key may be used to authenticate the key.
  • the validation input data 510 comprises information on the state of the validation input 114. In this example, the input may have two different values, on and off, or '1' and '0'. The usage of a validation input provides conditional access which does not require reprogramming of the lock.
  • a key with an access group to the lock of an apartment may be given to a cleaner who is scheduled to come once a week on a predetermined weekday.
  • the key stores validation data which requires to check the state of the validation input.
  • the owner of the apartment may switch the validation input to 'on' state only on the predetermined weekdays and at other times let the switch be in 'off' position.
  • the lock reads the access data and validation data from the key.
  • the lock determines that the key has the access group which allows the lock to be opened.
  • the lock also reads the validation data of the key and determines that the state of the validation input is to be checked.
  • On the predetermined weekdays the input is in 'on' state and the lock opens.
  • the input is in 'off' state and the lock does not open.
  • the validation switch is a simple mechanical switch in the lock. It is easy to use and no reprogramming of the lock is required.
  • the electronic circuit 112 of the electromechanical lock 106 stores each action to an access log data 520.
  • each attempt to open the lock may be viewed later.
  • the access log shows that keys with identifications 3, 9 and 22 have accessed the lock.
  • Figure 5B illustrates an example of another embodiment.
  • the figure illustrates an example of data stored on the electronic circuit 102 of the external device or the key 100 and on the electronic circuit 112 of the electromechanical lock.
  • the electronic circuit stores access group data 514 which contains the access groups in which the lock may be opened.
  • the electronic circuit 112 is configured to open the lock for keys belonging to access groups A, C, G, H and F provided that other required conditions are fulfilled.
  • the access group data stored on the electronic circuit 112 comprises the validation data for each access group.
  • the access groups A, H and F require checking of the state of the validation input.
  • Access groups C and G do not require such a check.
  • the access data 522 stored in the key does not comprise validation data. This embodiment gives the possibility to set a validation requirement lock by lock within same access group.
  • Figure 6 is a flowchart illustrating an embodiment. As default the lock is in a locked state and it remains in the locked state until set to an openable state.
  • step 600 The process starts in step 600 when a key 100 is connected to the electronic circuit 112 of the lock 106 through contacts 104 and 116.
  • step 602 the electronic circuit 112 authenticates the key using a strong authentication method, for example SHA-1.
  • step 604 If authentication fails, the process is interrupted in step 604 and the lock is kept in a locked state 624.
  • step 606 the electronic circuit 112 reads access data from the key 102.
  • step 608 the data read from the key is checked against a blacklist 518 stored in the lock.
  • step 610 the process is interrupted and the lock is kept in a locked state 624 if the key identification or any access groups of the key is found from blacklist data.
  • step 612 the state 510 of the validation input 114 is read.
  • validation data is determined from the access data and a predetermined criterion, the validation data comprising information whether a check of the validation input state is required.
  • step 616 the access data read from the key is compared against the access group data 524 and the access identification data 516. In addition, if validation data required checking the state of the validation input, such a check is made.
  • step 618 the process is interrupted if the comparisons fail and the lock is kept in a locked state 624.
  • step 620 log data is written to access log data 520.
  • step 622 the lock is set to an openable state by sending an open signal to the actuator 110.
  • FIGs 7A , 7B , 7C , 8A and 8B and illustrate examples of different embodiments.
  • a key 102 has data 500 with key identification ID 5 and only one access group, Access A, with validation data indicating that the state of the validation switch must be checked.
  • an electronic circuit 112 of the lock has several access groups in the access group data 514 including Access A.
  • a key ID 5 is not included in the access ID list 516. Neither ID 5 nor Access A is found in the blacklist data 518.
  • the validation switch 114 is turned off and therefore the validation status 510 is false.
  • the control logic 508 of the electronic circuit 112 determines that the key does not have access because the process is interrupted due to the wrong state of the validation input. When the validation switch 114 is turned on, the key will have access.
  • Fig 7B illustrates another example where a key 102 has data 500 with key identification ID 5 and only one access group, Access B, with validation data indicating that the state of the validation switch need not be checked.
  • an electronic circuit 112 of the lock has several access groups in the access group data 514 including Access B.
  • a key ID 5 is not included in the access ID list 516. Neither ID 5 nor Access B is found in the blacklist data 518.
  • the validation switch 114 is turned off and therefore the validation status 510 is false.
  • the control logic 508 of the electronic circuit 112 determines that the key does have access despite the validation status 510 because Access B does not require validation.
  • Fig 7C illustrates another example where a key 102 has data 500 with key identification ID 5 and two access groups, Access A with validation requirement and Access B without validation requirement.
  • an electronic circuit 112 of the lock has several access groups in the access group data 514 including Access A and Access B.
  • a key ID 5 is not included in the access ID list 516. Neither ID 5 nor Access B is found in the blacklist data 518.
  • the validation switch 114 is turned off and therefore the validation status 510 is false.
  • the control logic 508 of the electronic circuit 112 determines that the key does have access despite the validation status 510 because Access B does not require validation.
  • Fig 8A illustrates an example where a key 102 has data 500 with key identification ID 5 and one access group, Access A.
  • An electronic circuit 112 of the lock has in the access group data 524 an access group Access A with validation data indicating that the state of the validation switch must be checked.
  • a key ID 5 is not included in the access ID list 516. Neither ID 5 nor Access B is found in the blacklist data 518.
  • Validation switch 114 is turned off and therefore the validation status 510 is false.
  • the control logic 508 of the electronic circuit 112 determines that the key does not have access because the process is interrupted due to the wrong state of the validation input. When the validation switch 114 is turned on, the key will have access.
  • Fig 8B illustrates an example where a key 102 has data 500 with key identification ID 5 and one access group, Access A.
  • an electronic circuit 112 of the lock has in the access group data 524 an access group Access A with validation data indicating that the state of the validation switch need not be checked.
  • a key ID 5 is not included in the access ID list 516. Neither ID 5 nor Access B is found in the blacklist data 518.
  • Validation switch 114 is turned off and therefore the validation status 510 is false.
  • the control logic 508 of the electronic circuit 112 determines that the key does have access despite the validation status 510 because Access A does not require validation.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lock And Its Accessories (AREA)
EP07112675A 2007-07-18 2007-07-18 Verrouillage et clé électromécanique Withdrawn EP2017794A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07112675A EP2017794A1 (fr) 2007-07-18 2007-07-18 Verrouillage et clé électromécanique
PCT/FI2008/050434 WO2009010637A1 (fr) 2007-07-18 2008-07-16 Verrou électromagnétique et clé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07112675A EP2017794A1 (fr) 2007-07-18 2007-07-18 Verrouillage et clé électromécanique

Publications (1)

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EP2017794A1 true EP2017794A1 (fr) 2009-01-21

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EP07112675A Withdrawn EP2017794A1 (fr) 2007-07-18 2007-07-18 Verrouillage et clé électromécanique

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EP (1) EP2017794A1 (fr)
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110174029A1 (en) * 2010-01-15 2011-07-21 Iloq Oy Electromechanical lock
WO2012136623A1 (fr) * 2011-04-04 2012-10-11 Hw Verwaltungs Gmbh Procédé pour la fermeture et la sécurisation de contenants contre toute ouverture intempestive
EP3568903A4 (fr) * 2017-01-16 2020-10-14 Revibe Energy AB Dispositif et procédé pour agencement de générateur de collecte d'énergie micro-transitoire
US20230006330A1 (en) * 2019-12-04 2023-01-05 Netatmo Smart lock having an electromechanical key
US11804084B2 (en) 2013-09-10 2023-10-31 Lockfob, Llc Contactless electronic access control system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8922333B1 (en) 2013-09-10 2014-12-30 Gregory Paul Kirkjan Contactless electronic access control system
US11574513B2 (en) 2020-03-31 2023-02-07 Lockfob, Llc Electronic access control

Citations (4)

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Publication number Priority date Publication date Assignee Title
US4916443A (en) * 1985-10-16 1990-04-10 Supra Products, Inc. Method and apparatus for compiling data relating to operation of an electronic lock system
US5591950A (en) * 1992-11-04 1997-01-07 Talleres De Escoriaza, S.A. (Tesa) Programmable electronic lock
US5670940A (en) * 1996-04-19 1997-09-23 Trioving A.S Electronic lock system with occupancy block
US5850753A (en) * 1993-12-23 1998-12-22 Varma; Shivendra Code-operated catch mechanism for hotel room door

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4916443A (en) * 1985-10-16 1990-04-10 Supra Products, Inc. Method and apparatus for compiling data relating to operation of an electronic lock system
US5591950A (en) * 1992-11-04 1997-01-07 Talleres De Escoriaza, S.A. (Tesa) Programmable electronic lock
US5850753A (en) * 1993-12-23 1998-12-22 Varma; Shivendra Code-operated catch mechanism for hotel room door
US5670940A (en) * 1996-04-19 1997-09-23 Trioving A.S Electronic lock system with occupancy block

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110174029A1 (en) * 2010-01-15 2011-07-21 Iloq Oy Electromechanical lock
US8581690B2 (en) * 2010-01-15 2013-11-12 Iloq Oy Electromechanical lock
WO2012136623A1 (fr) * 2011-04-04 2012-10-11 Hw Verwaltungs Gmbh Procédé pour la fermeture et la sécurisation de contenants contre toute ouverture intempestive
US11804084B2 (en) 2013-09-10 2023-10-31 Lockfob, Llc Contactless electronic access control system
EP3568903A4 (fr) * 2017-01-16 2020-10-14 Revibe Energy AB Dispositif et procédé pour agencement de générateur de collecte d'énergie micro-transitoire
US20230006330A1 (en) * 2019-12-04 2023-01-05 Netatmo Smart lock having an electromechanical key

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