Case for hand-held electronic calculator

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Description

FIG. 1 is a view in perspective of a case for a hand-held calculator showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right-side elevational view thereof, the left-side elevational view thereof being essentially a mere image thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a rear elevation view of a case for a hand-held calculator showing a modified form of our new design; and

FIG. 7 is a left side elevational view thereof, the right side being a mirror image and the front being the same as FIG. 2.

Referenced Cited
U.S. Patent Documents
D230404 February 1974 Jimbo
D241381 September 1976 Garnier
D243535 March 1, 1977 Ikeda
D247391 February 28, 1978 Hazama et al.
D249093 August 22, 1978 Hazama et al.
4158230 June 12, 1979 Washizuka et al.
Patent History
Patent number: D256370
Type: Grant
Filed: Jul 12, 1978
Date of Patent: Aug 12, 1980
Assignee: Texas Instruments Incorporated (Dallas, TX)
Inventors: Shinpei Ichikawa (Lubbock, TX), Robert A. Welch (Lubbock, TX)
Primary Examiner: Louis S. Zarfas
Attorney: Rene E. Grossman
Application Number: 5/923,859
Classifications
Current U.S. Class: With Keyboard (D18/7)
International Classification: D1801;