Telephone key expansion unit

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Description

FIG. 1 is a perspective view of the telephone key expansion unit of the present invention;

FIG. 2 is a top view;

FIG. 3 is a front elevational view;

FIG. 4 is a right-side elevational view;

FIG. 5 is a left-side elevational view;

FIG. 6 is a rear elevational view; and,

FIG. 7 is a bottom view.

The broken lines showing of a telephone in FIG. 1 is for illustrative purposes only and forms no part of the claimed design.

Referenced Cited
U.S. Patent Documents
D306027 February 13, 1990 Gagnon
D306859 March 27, 1990 Helstab et al.
D311918 November 6, 1990 Renard
D312461 November 27, 1990 Ando
D317920 July 2, 1991 Fuqua et al.
D319235 August 20, 1991 Sato
D340057 October 5, 1993 Wetzel et al.
D346385 April 26, 1994 Wetzel et al.
4790007 December 6, 1988 Richter et al.
5373556 December 13, 1994 Johnson
Other references
  • B. A. Pargh, 1992 Spring/Summer Catalog, Panasonic 6X16 Electronic Modular Switching System, p. 330, 2nd Article from top at far right.
Patent History
Patent number: D374674
Type: Grant
Filed: Jun 2, 1995
Date of Patent: Oct 15, 1996
Assignee: Siemens Rolm Communications Inc. (Santa Clara, CA)
Inventors: Erich C. Elkins (San Francisco, CA), Wayne E. McKinnon (Georgetown, TX), David E. Bryant (Austin, TX), Mary E. Kingsbury (Dallas, TX), Doug A. Erwin (Austin, TX), William C. McRight (Round Rock, TX)
Primary Examiner: Jeffrey Asch
Application Number: 0/39,812
Classifications
Current U.S. Class: D14/241