Marking material

Mass transportation passenger guidance system

Maximum and minimum brake temperature indicator

Means and method for sensing loom conditions indicative of...

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

Means for the temporary detainment of a wrongdoer

Measuring apparatus

Mechanically actuatable alarm disable assembly

Medcial gas alarm system

Medi-lert

Medical monitoring system having multipath communications...

Medication compliance device

Medication reminder device

Membrane type non-intrusive ice detector

Merchandise display and categorical indicators

Merchandise item protection apparatus

Merchandise locator system

Merchandise mark sensing system

Metal detecting system

Metal detection and alarm systems