CERTITECH

Centrally operated vacuum cleaner systems, comprising a central vacuum power unit, connecting conduits, cleaning nozzles, low voltage electrical switch components and parts therefore, namely, handles, hoses, wands, brushes, powerheads, and vacuum inlets

Fire detection, monitoring and alarm systems and accompanying accessories, namely, network systems, multiplex systems, stand alone systems, voice communication systems and fire alarm emergency phone systems, comprising, graphical command centers, manual stations, smoke detectors and sensors, flame detectors, heat detectors and sensors, water flow switches, sprinkler supervisory switches, door holders and/or closures, modems, fiber optic line drivers, alarm communicator transmitters and receivers, remote station receivers, audible and visible notification appliances, annunciators, intercoms, CRT monitors and printers, batteries and charges and transient suppressors; Telephone systems, comprised of a handset and console unit with console features, namely, standard telephone functions, one-touch dialing, call progress monitoring, group listening, clock/calendar and alarm, electronic display, and modules for features, namely, automatic dialing, call restriction, stored message recall, and custom calling; communicating apparatuses, namely, facsimile apparatus and telephones with two way video transmitters; stereo systems comprising stereo amplifiers, stereo cables, stereo receivers, stereo tuners, and remote controls for stereos; audio distribution systems comprising line level stereo distribution consoles, stereo cables; audio infrared systems comprising remote controls for stereos, infrared distribution consoles, repeaters, RF distribution consoles; audio RF systems comprising remote controls for stereos, RF tuning devices, namely resonators; Audio products, namely, radio receivers, tape recorders, tape players, CD players, CD recorders, television receiving sets, video tape players, video tape recorders, DVD players, DVD recorders; display systems for DVD, compact discs, mini-discs and digital discs consisting of multimedia projectors and projection screens; audio equipment, namely, speakers, speaker wires, woofers, sub-woofers, tweeters, mid-range drivers and cross-over networks in the form of an electrical frequency dividing circuitry therefore; Low voltage electrical wire, namely solid core, braided, stranded, twisted pair; Ethernet, fiber optic, coaxial, termination modules; decorative switch plate covers, namely, telephone plates, data plates, coax plates, speaker plates, interface plates