Improved cylinder lock system

Improved cylinder lock system

Improved disc tumbler lock

Improved door latch assembly with accelerated bolt motion,...

Improved door locking device

Improved drop safe

Improved electronic lock

Improved friction hinge

Improved garage door opener

Improved hinge and panel surface geometry of a multi-panel...

Improved hinge for furniture and the like, with movable arm...

Improved hinge motion check friction device, methods...

Improved hinge with removable pin

Improved keys for cylinder locks

Improved length-adjustable bolt

Improved lock for bidirectional doors

Improved lock mechanism

Improved locking device for bird/animal cage

Improved metallic hinge motion check friction device...

Improved method, system and apparatus for opening doors