Acoustically coupled modem

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Description

FIG. 1--is a top plan view of acoustically coupled modem in accordance with my new design;

FIG. 2--is a front elevational view thereof;

FIG. 3--is a left side view thereof;

FIG. 4--is a bottom plan view thereof;

FIG. 5--is a rear elevational view thereof; and

FIG. 6--is a right side view thereof.

Referenced Cited
U.S. Patent Documents
D212692 November 1968 Plantholt
D222747 December 1971 Albrecht
D222751 December 1971 Rudin
D224317 July 1972 Marsalka et al.
D239536 April 1976 Chadeina et al.
D244035 April 12, 1977 Ault
D261761 November 10, 1981 Ingelser et al.
D265992 August 31, 1982 Hirata et al.
D270834 October 4, 1983 Genaro et al.
3436474 April 1969 Saegar et al.
3553374 January 1971 Wolf et al.
3605021 September 1971 Mychalowych
4068095 January 10, 1978 Ghormley
4097691 June 27, 1978 Ehrlich et al.
4162373 July 24, 1979 Ingber
4246444 January 20, 1981 Mason
4340784 July 20, 1982 McQueen et al.
4410759 October 18, 1983 Kessler
Foreign Patent Documents
58-56559 April 1983 JPX
Other references
  • "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.
Patent History
Patent number: D281878
Type: Grant
Filed: Apr 15, 1982
Date of Patent: Dec 24, 1985
Assignees: Kabushiki Kaisha Epson Corporation (Tokyo), Suwa Seikosha (Nagano)
Inventor: Yoshikazu Kawakami (Shiojiri)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Horace B. Fay
Law Firm: Blum, Kaplan, Friedman, Silberman & Beran
Application Number: 6/368,772
Classifications
Current U.S. Class: D14/57; D14/101; D14/52