Refrigerator and freezer monitoring device

Refrigerator door ajar alarm with variable delay

Refrigerator having power outage duration feature

Refuge indicator

Register mark detection

Regulator and switching circuit for flasher units

Releasable locking apparatus for the detection of...

Remote and digital data transmission systems and satellite...

Remote area monitoring system

Remote care service technique, care recipient monitoring...

Remote contact sensing scanpoint matrix

Remote control alarm device

Remote control apparatus for a property protection device

Remote control finder

Remote control of a control system

Remote control of a security system using e-mail

Remote control system

Remote device for a monitoring system

Remote garage door monitoring system

Remote inspection of emergency equipment stations