Masked passive infrared intrusion detection device and method of

Mass transportation passenger guidance system

Master authenticator

Master automotive sensor tester

Master control panel for loading dock equipment

Master control panel for loading dock equipment

Mat sensor

Material level indicating apparatus with status light and extern

Material sensing device

Material support system for supporting items having radio...

Materials and construction for a tamper indicating radio...

Maternal sound level device and method for protecting fetal hear

Mattress or chair sensor envelope with an antenna

Maximum and minimum gas flow sensor

Meal minder device

Means and method for detecting presence of electrically conducti

Means and method for determining the rotation direction of an oi

Means and method for monitoring a protective garment

Means for checking battery voltage level

Means for detecting leakage in the inner lining of tanks and pip