Lighting calculator

- Cooper Industries, Inc.
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Description

FIG. 1 is a top, right perspective view of a lighting calculator showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a front elevational view thereof.

Referenced Cited
U.S. Patent Documents
D258895 April 14, 1981 Kobayashi
D273303 April 3, 1984 Sakamoto
D273502 April 17, 1984 Sakata
D285806 September 23, 1986 Satake
4507745 March 26, 1985 Agrawal
4715011 December 22, 1987 Brittan
4744044 May 10, 1988 Stover et al.
4857898 August 15, 1989 Smith
Other references
  • Hong Kong Enterprise; 1/1986 p. 155; #1 SVI-1000 Economizer.
Patent History
Patent number: D317620
Type: Grant
Filed: Mar 31, 1988
Date of Patent: Jun 18, 1991
Assignee: Cooper Industries, Inc. (Houston, TX)
Inventor: Raymond J. Kusmer (La Habra, CA)
Primary Examiner: Nelson C. Holtje
Assistant Examiner: Caron D. Veynar
Attorneys: Michael F. Heim, Elliott Cox, Alan Thiele
Application Number: 7/176,813
Classifications
Current U.S. Class: With Keyboard (D18/7)