1
Ewing Lionel Lee: Electrically operated two position electromechanical mechanism. February 12, 1974: US3792391 (87 worldwide citation)

An electrical type of lock wherein the mechanical movement is actuated in response to a solenoid system triggered by an electrical momentary signal. The locking bolt alternatively changes from a locking to unlocking position or vice versa in a snap action and is retained in its respective position. ...


2
Ewing Lionel Lee: Closed loop communication wire system. Cennamo Kremblas & Foster, February 11, 1975: US3865984 (3 worldwide citation)

A system for controlling the operation of a plurality of electrical actuating devices, located at diverse points, from a remotely located control station via the conventional communication or telephone lines. Direct current voltage is transferred from the remote station to the local stations wherein ...