System for controlling the use of a plurality of items

System for interlocking objects

System for obstructing movement of lock pins

System for ornamenting a key

System for remote operation of a deadbolt lock

System for the increase of the number of differing locking possi

System for the use of lockers or the like

System of interconnected lock-cylinders

System of locking

System of non-reproducible locking key and cylinder for said key

Tamper inhibiting device for use with a lock

Tamper preventing lock

Tamper proof locking device

Tamper resistant lock bolt assembly

Tamper resistant locking device

Tamper-evident electronic combination lock having integral beari

Tamper-proof axial tumbler type lock

Tamper-resistant lock

Tamper-resistant lock and key assembly

Tamper-resistant lock assembly