Telephone

Details Telephone Telephone

1992-04-15

1993-10-05

Douglas, Alan P.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

D14144, D14150

Patent

active

D03400557

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patent: D74188 (1928-01-01), Obergfell
patent: D92442 (1934-06-01), Worthington
patent: D95765 (1935-05-01), Lum
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patent: D138679 (1944-08-01), McLarn et al.
patent: D153927 (1949-05-01), Dreyfuss
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patent: D280505 (1985-09-01), Genaro et al.
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patent: 1965423 (1934-07-01), Lum
patent: 1999948 (1935-04-01), Stephenson
patent: 2326591 (1943-08-01), White
patent: 2487013 (1949-11-01), Zibelman
patent: 2541270 (1951-02-01), Mitnick
patent: 2593475 (1952-04-01), Neilsen
patent: 2678779 (1954-05-01), Bellmer
patent: 2703821 (1955-03-01), Kopp et al.
patent: 2739188 (1956-03-01), O'Connell
Siemens Brothers & Co., Ltd; Siemens London Neophone, p. 8; Aug. 1929; England.
Siemens Brothers & Co. Ltd; Siemens Brother's Standard dial; 1931?; p. 15; England.
Siemens Brothers & Co., Ltd; 10, 25 and 50 Line Private Exchange Equipments; Oct. 1932, pp. 1, 5, 6, 7; England.
Siemens; Siemens Telephones for Private Installation May 1936; pp. 7, 14, 19, 20, 24, 25; England.
The Post Office Electrical Engineers Journal; The New Combined Microtelephone and Bell Set; Apr. 1938; pp. 1, 2; place unknown.
Aldridge Barnes, Foulger; A New C. B. Microtelephone; p. 185; place of publication unknown.
The Telegraph and Telephone Journal; Siemens Neophone; Page i; Oct. 1931; England.
Siemens Brothers & Co. Ltd; Siemens Brothers' Neophone-Type 310; pp. 4, 20; Jul. 1932; England.
Siemens Brothers & Co., Ltd.; Catalogue; refer to all pages; date unknown; Great Britain.
Majestic Telephone Corp. Catalog.

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