Combined desktop abacus and electronic calculator

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Description

FIG. 1 is a top plan view of a combined desktop abacus and electronic calculator showing my new design;

FIG. 2 is a rear elevational view;

FIG. 3 is a left side elevational view, the right side being a mirror image; and

FIG. 4 is a front elevational view.

Referenced Cited
U.S. Patent Documents
D271025 October 18, 1983 Li
3688418 September 1972 Wilson
Foreign Patent Documents
1094208 May 1955 FRX
132847 August 1983 JPX
86872 March 1921 CHX
Other references
  • Merchandising, 6/1983, p. 57-Pen Set with Calculator at upper left.
Patent History
Patent number: D284975
Type: Grant
Filed: Aug 7, 1984
Date of Patent: Aug 5, 1986
Inventor: Herbert Kwok (Northbrook, IL)
Primary Examiner: Louis S. Zarfas
Attorneys: Charles E. Brown, Charles A. Brown
Application Number: 6/638,575