Pushbutton operated door locks

Pushbutton operated door locks

Puzzle lock

Quincunx-shaped lock device

Radio frequency identification (RFID) system for...

Radio frequency identification (RFID) system for...

Radiographically secure combination lock

Radiological detection resistant combination lock

Radiological detection resistant key changeable combination lock

Randomly and integrally re-keyable lock apparatus and method

Randomly and integrally re-keyable lock apparatus and method

Randomly engageable combination locking device

Randomly-false-gated tumbler wheels for combination locks

Rationing cigarette dispenser

Re-combinate removable plug lock

Re-keyable cylinder lock

Re-keyable lock and method

Re-keyable lock assembly

Re-keyable lock cylinder

Re-keyable lock with improvements for preventing incomplete...