ultrasonic welding apparatus, namely ultrasonic generators, power supplies, automatic presses, automatic thrusters, ultrasonic welding horns and fixtures for holding workpieces to be welded

filmstrip projectors; filmstrip viewers; overhead projectors; liquid crystal display projection panels; computer data/video projectors; microfilm readers; attachments for microfilm readers, namely manual roll film drives, motorized roll film drives, and microfiche or microfilm jacket and aperture card holders; communication apparatus for commercial facilities and institutions; namely master station consoles, remote stations including bedside patient stations, display terminals, keyboards and computer hardware and software for connecting to and integrating with other communication systems and for activity recording, monitoring and reporting and for personnel registry and voice mail; school instructional technology systems for controlling communications, record keeping, time keeping and media distribution in schools; namely computer hardware and software for system diagnostics, for information logging and processing, for interfacing with a local area network, for reading bar codes, for mouse control, for tracking system activity, for database management, for voice and visual messaging, and for record keeping and time keeping, and classroom control stations, comprising consoles providing controls and connections for telephone, call switch, remote television power switch, data inputs, audio and video inputs and computer modem; master control clocks; audio components, namely compressor/limiters, power amplifiers, equalizers, mixers/preamplifiers, monitor panels, speakers, baffles, horns, drivers, program sources and audio masking generators; computer hardware and software for automatic process control of ultrasonic welding apparatus and for providing communication with peripheral devices; and underwater acoustic detection and location apparatus, namely underwater acoustic beacons, acoustic receivers and portable test sets for testing underwater acoustic beacons