Conferencing telephone unit

- Northern Telecom Limited
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Description

FIG. 1 is a perspective view of the conferencing telephone unit;

FIG. 2 is a top plan view of the unit illustrated in FIG. 1;

FIG. 3 is a bottom plan view of the unit illustrated in FIG. 1; and

FIG. 4 is a side view of the unit illustrated in FIG. 1.

Referenced Cited
U.S. Patent Documents
D192637 April 1962 Judson
D212004 August 1968 Emond
D227478 June 1973 Ekdahl
D244468 May 24, 1977 Buchin
3931867 January 13, 1976 Janszen
4078155 March 7, 1978 Botros et al.
4184048 January 15, 1980 Alcaide
Patent History
Patent number: D259786
Type: Grant
Filed: Oct 3, 1978
Date of Patent: Jul 7, 1981
Assignee: Northern Telecom Limited (Montreal)
Inventors: Fred D. Leeson (London), Henry A. Main (London), Clifford D. Read (Almonte)
Primary Examiner: Bernard Ansher
Attorney: Sidney T. Jelly
Application Number: 5/948,205
Classifications
Current U.S. Class: D14/57; D14/33; D/6148
International Classification: D1403; D0603;