3r regenerator with wavelength conversion

4-channel headphones

4-channel stereophonic demodulating system

4-level fsk demodulator

4-vf line multiplexer

4.5 mhz (intercarrier) fm modulator

5-2-5 matrix encoder and decoder system

8-phase phase-shift keying demodulator

800 number call back

802.11 using a compressed reassociation exchange to...

802.11using a compressed reassociation exchange to...

802.1x authentication technique for share media

900 number billing and collection system and method for...

A .pi./4-dqpsk delay spread detection and compensation...

A base station for a frequency hopping tdma radio...

A battery alarm for a hearing aid, a hearing aid and a...

A battery and ink charging stand or mobile communication...

A battery compartment for a hearing aid

A biasing component for raising and lowering a keyboard for...

A bidirectional cable network with a mixing tap for...