Tumbler plate cylinder lock
Tumbler type lock
Tumbler-type key verification system
Turning knob with lock
Turnover key and corresponding cylinder lock
Two anti-theft locks
Two-stage lock cylinder structure
U-lock keyway protector
Universal adaptor for deadbolt
Universal apparatus for use with electronic and/or mechanical ac
Universal backup handcuff key
Universal barrel key apparatus
Universal cylinder modification kit enables lock to have interch
Universal fob
Universal lock and key
Universal lock and key
Unlocking device for concealing keyhole of lock
User-installed furniture lock
Vandal-resistant torque sensitive release mechanism
Vandal-resistant torque sensitive release mechanism with angular