Telephone set

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment

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D14247

Patent

active

D03192350

REFERENCES:
patent: D251844 (1979-05-01), Kramer
patent: D270155 (1983-08-01), Shimizu
patent: D282840 (1986-05-01), Marshall
patent: D294940 (1988-03-01), Brown et al.
patent: D295406 (1988-04-01), Dunstall
patent: D300824 (1989-04-01), Okuda et al.
patent: D306296 (1990-02-01), Hayashi
patent: D306444 (1990-03-01), Fried et al.
patent: D307426 (1990-04-01), Ohta et al.
patent: D307751 (1990-05-01), Oshima et al.
patent: D312258 (1990-11-01), Atkins
Inspec; Patent Associated Literature; 1975: Source Pub.: Nachrichten der Telefonbau and Normalzeit #76, pp. 31-38, 1975.

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