Method of making a concrete safe
Method of making secure enclosure for automated banking machine
Method of teaching transmitter codes to remote receivers
Method to prevent unauthorized use of cassette tape...
Methods and apparatus for a single lever tilt lock latch window
Methods and apparatus for assembling a door handle assembly
Micro-power-consumed passive electric lock
Microcomputer controlled door locking system
Microcontroller based automatic door obstruction detector
Microelectronic memory key with receptacle and systems therefor
Mine door
Mine door
Mine door operating means
Mine door operator
Mode-switchable door strike
Modified garage door opener linkage
Modular concrete vault structure
Modular door handles
Modular electromechanical locking cylinder
Modular latch