Combined data transmitter/receiver modem and security modem for

Details Combined data transmitter/receiver modem and security modem for Combined data transmitter/receiver modem and security modem for

1985-02-19

1987-11-24

Lucas, Susan J.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

Patent

active

D02929260

REFERENCES:
patent: D243254 (1977-02-01), Coon
patent: D272907 (1984-03-01), Coons
patent: 3976840 (1976-08-01), Cleveland et al.
Computer Products, 10-1981, p. 44, Data Encryptor for Preventing Unauthorized Access.

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