Acoustically coupled modem

Recording – communication – or information retrieval equipment – Computer – data processor equipment


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D14101, D14 52




patent: D212692 (1968-11-01), Plantholt
patent: D222747 (1971-12-01), Albrecht
patent: D222751 (1971-12-01), Rudin
patent: D224317 (1972-07-01), Marsalka et al.
patent: D239536 (1976-04-01), Chadeina et al.
patent: D244035 (1977-04-01), Ault
patent: D261761 (1981-11-01), Ingelser et al.
patent: D265992 (1982-08-01), Hirata et al.
patent: D270834 (1983-10-01), Genaro et al.
patent: 3436474 (1969-04-01), Saegar et al.
patent: 3553374 (1971-01-01), Wolf et al.
patent: 3605021 (1971-09-01), Mychalowych
patent: 4068095 (1978-01-01), Ghormley
patent: 4097691 (1978-06-01), Ehrlich et al.
patent: 4162373 (1979-07-01), Ingber
patent: 4246444 (1981-01-01), Mason
patent: 4340784 (1982-07-01), McQueen et al.
patent: 4410759 (1983-10-01), Kessler
"Port a Com", PC-8110 Comunications Terminal Set by Stelma, Subsid. of Data Products Corp., Brochure-1969.
Brochure showing Anderson Jacobson Model AD7 233, Acoustic Data Couple, pp. 2, 4.
"60 Modern" article, part 2, Radio Electronics, pp. 45, 48; Issueof July 1981.
"76 E Subset Data Terminal" Article in Teleteknik (Engl. Ed.) (Denmark) No. 1 (1979) p. 34.


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