Secure telephone modem or similar article

Details Secure telephone modem or similar article Secure telephone modem or similar article

1986-11-21

1989-07-18

Lucas, Susan J.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

D14240, D14142

Patent

active

D03022684

REFERENCES:
patent: D262106 (1981-12-01), Frassanito
patent: D269345 (1983-06-01), Payne, Jr. et al.
patent: D285554 (1986-09-01), Beaumont et al.
patent: D292926 (1987-11-01), Gillespie et al.
patent: D295178 (1988-04-01), Pedinielli et al.
patent: D295752 (1988-05-01), MacKenzie et al.
patent: 4005367 (1977-01-01), Dano
patent: 4310923 (1982-01-01), Kennedy
patent: 4652969 (1987-03-01), Stegenga
Computer Products Oct. 1986, p. 23-v. 32 Full Duplex 9600 bps Trellis Coded Modem.
Glasgal Communications, Inc. 1984, p. 7-Modem AJ1212AD1 top left box.
Personal Computing Mar. 1984, p. 222-Indus GT Modem.

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