Backgammon calculator
Description
FIG. 1 is a front perspective view of a backgammon calculator showing my new design;
FIG. 2 is an end elevation thereof; and
FIG. 3 is a rear perspective view thereof.
Referenced Cited
U.S. Patent Documents
Other references
| 4223893 | September 23, 1980 | Shane |
- Home Furnishings Daily, Thursday, Feb. 13, 1975, p. 11, FX-10 Casio Calculator.
Patent History
Patent number: D261666
Type: Grant
Filed: Jul 3, 1979
Date of Patent: Nov 3, 1981
Inventor: Andrei Sorin (North York (Don Mills), Ontario)
Primary Examiner: Melvin B. Feifer
Law Firm: Ridout & Maybee
Application Number: 6/54,586
Type: Grant
Filed: Jul 3, 1979
Date of Patent: Nov 3, 1981
Inventor: Andrei Sorin (North York (Don Mills), Ontario)
Primary Examiner: Melvin B. Feifer
Law Firm: Ridout & Maybee
Application Number: 6/54,586
Classifications
