Structure of key and lock barrel for lock set
Super grip fabric lock
Switch cabinet door lock
Switch lock
Switch lock with two momentary positions
Switchlock assembly with snap-in cam
Symmetrical side bar lock and key therefor
System and apparatus for opening cylinder locks
System consisting of a noncopyable key and a closed cylinder for
System for controlling the use of a plurality of items
System for obstructing movement of lock pins
System for ornamenting a key
System for the increase of the number of differing locking possi
System of interconnected lock-cylinders
System of locking
System of non-reproducible locking key and cylinder for said key