Calculator

- Joseph Leeb Enterprises
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Description

FIG. 1 is a top plan view of a calculator showing my new design;

FIG. 2 is a front elevational view;

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

FIG. 4 is a rear elevational view; and

FIG. 5 is a bottom plan view.

Both the keyboard and display portions of the calculator are transparent throughout the thickness of the calculator.

Referenced Cited
U.S. Patent Documents
4154007 May 15, 1979 Judd
4468203 August 28, 1984 Gimmestad et al.
4711992 December 8, 1987 Sekine
Other references
  • Catalog 1--Smart Products by Polyflame Concepts, ASI #78897 (1987), pp. 1,3. Product identified in Jan. 1987 Distributor Price List (also enclosed). Catalog 2--1987 The Catalog, cover and p. B4 (both sides). Catalog 3--1988 Tagmaster Advertising Specialties Showcase, cover and p. 5. Catalog 4--Enterprex Int'l Corp. promotional sheet (undated) Possibly related product identified in price list, p. 11, dated 12/31/86. HFD-Retailing Home Furnishing, 1/7/85, p. 75--Panasonic Solar Calculator w/transparent Keyboard.
Patent History
Patent number: D300539
Type: Grant
Filed: Aug 7, 1987
Date of Patent: Apr 4, 1989
Assignee: Joseph Leeb Enterprises (Upper Saddle River, NJ)
Inventor: Robert Wong (Kowloon)
Primary Examiner: Louis S. Zarfas
Law Firm: Amster, Rothstein & Ebenstein
Application Number: 7/83,414