Electronic lock and key system for hotels and the like
EP0152678A2
Electronic lock and key system for hotels and the like
CA1194519A
Spring-loaded dead bolt assembly
US4376382A
Resettable lock assembly
US4336701A
Keying process for resettable lock
ES452634A1
A lock. (Machine-translation by Google Translate, not legally binding)
DE2646739A1
Cylinder lock for vehicles, buildings, furniture - has adjustable locked cams allowing alteration to accept alternative keys while preventing opening with skeleton key