77536618
Jul 31, 2008
Mar 23, 2010
WIRELESS VOICE COMMUNICATION SYSTEM FOR USE IN UNDERGROUND MINES AND CONFINED SPACES, namely, NETWORK CONTROLLERS, TEXT MESSAGING MOBILE COMMUNICATORS, namely, IN THE NATURE OF TRANSMITTER/RECEIVERS, MOBILE COMMUNICATION TAGS, namely, TRANSMITTERS FOR TRANSMITTING THE LOCATION AND IDENTITY OF THE HOLDER THEREOF, WIRELESS ACCESS POINT DEVICES
Electrical and Scientific Apparatus