1
Walter G Henderson, John Q Archer II, Gerald R Daum, George A Ellson, John E Gray, Wayne F Larson, Rockne M Olds, Jerry P Scansen, John W Sherman, Edgar J Unrein: Electronic key with interactive graphic user interface. Supra Products, Klarquist Sparkman Campbell Leigh & Whinston, April 3, 1990: US04914732 (179 worldwide citation)

An electronic key for an electronic lock system is provided with graphical user interface which can display a plurality of symbols corresponding to a plurality of functions that the key can cause the lock to execute. An operator of the key moves a visual indicia among these symbols to select a desir ...


2
Gary E Lavelle, Peter S Conklin, Brian D Hass, John E Walsh III: Multiple access electronic lock system. Harrow Products, Alix Yale & Ristas, July 13, 1999: US05923264 (104 worldwide citation)

An electronic door security system employs an input console having two readers for enhanced security. A microprocessor processes inputs applied at each of the readers to selectively permit access through a secured door. Application of an input to either reader transforms the controller to a power-up ...


3
Philip D Barrett, Walter G Henderson, Wayne F Larson: Keysafe system with timer/calendar features. Supra Products, Klarquist Sparkman Campbell Leigh & Whinston, January 29, 1991: US04988987 (81 worldwide citation)

An electronic lock system is disclosed in which a key can be assigned a limited lifetime, such as by storing data indicative of an expiration date in a key memory. Whenever the key is used with a lock, the lock first examines this key data and verifies that the key is still timely before performing ...


4
Klaus W Gartner, Alan K Uyeda, Peter J Phillips: Self-locking electronic lock. LA Gard, Poms Smith Lande & Rose, July 23, 1991: US05033282 (71 worldwide citation)

A self-locking electronic lock system is illustrated in association with safe doors having a door locking bolt works manipulated between door open and door locked positions by a door mounted handle. The bolt works includes a link which moves the door bolts and in turn is locked by an electronic lock ...


5
George R Schull: Key actuated electronic lock for auto ignitions. September 20, 1977: US04050063 (65 worldwide citation)

A key-actuated electronic lock system for auto ignitions including a conventional auto ignition key-lock combination. Electronic lock actuating information is stored on the key and the lock supports a transducer for sensing the information stored on the key as it is inserted into the lock and for ge ...


6
Philip D Barrett, Gerald R Daum, Wayne F Larson: Method and apparatus for compiling data relating to operation of an electronic lock system. Supra Products, Klarquist Sparkman Campbell Leigh & Whinston, April 10, 1990: US04916443 (64 worldwide citation)

A key is provided with a memory in which, without user intervention, it collects data relating to lock operations each time the key interacts with a lock. This data is subsequently downloaded from the key to a computer. In some embodiments, the keys collect data relating not just to their own transa ...


7
Klaus W Gartner, Alan K Uyeda: Self locking electronic lock. Poms Smith Lande & Rose, May 22, 1990: US04926664 (64 worldwide citation)

A self locking electronic lock system is illustrated in association with safe doors having a door locking bolt works manipulated between door open and door locked positions by a door mounted handle. The bolt works includes a link which moves the door bolts and in turn is locked by an electronic lock ...


8
Carey S Clark, Gordon B Winch: Electronic lock system. Carey S Clark, Christensen O Connor Johnson & Kindness, May 9, 1989: US04829296 (58 worldwide citation)

An electronic lock system adapted for use with receivers, such as parking meters, that include storage means and an electronically operable actuator for providing access to material such as coins contained within the storage means in response to an electronic actuation signal. The electronic lock sy ...


9
Robert Richard Perron, John E Trombly: Keyhole-less electronic lock. The Eastern Company, June 21, 1977: US04031434 (56 worldwide citation)

An inductively coupled electronic lock system wherein a key unit receives binary multiple bit data and generates a binary frequency modulated carrier which is input to a transmitter inductor. A lock unit of the system has an inductive pick-up which compares the received sequence of binary signals wi ...


10
Perron Robert R, Fowler John T: Digital lock system having electronic key card. Arthur D Little, Stein and Orman, January 7, 1975: US3859634 (54 worldwide citation)

An electronic lock system in which a coded data word is stored in a key and, upon insertion of the key into a lock, compared with a master code. A predetermined correspondence between the key code and the master code causes the provision of an output signal for actuation of the lock or other utiliza ...