Master-key piston lock

Master-keyed cylinder comprising tumblers and corresponding...

Master/valet keyset and lock

Maximum-security lock

Maze-type locking device

Means for locking a displaceable or rotatable part

Means for, and a method of, adjusting a cylindrical lockset for

Mechanical card lock

Mechanical code comparator

Mechanical code lock

Mechanical combination lock

Mechanical dial combination lock

Mechanical key and locking/unlocking key

Mechanical key code verification system

Mechanical lock having a variable key

Mechanical push button lock

Mechanical/electronic lock and key therefor

Mechanical/electronic lock and key therefor

Mechanically changeable cylinder lock and key with rotating pins

Mechanism for keyless lock systems