Mathematical educational device

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Description

FIG. 1 is a perspective view of the mathematical educational device showing my new design, and having the lid to a storage compartment associated therewith shown in a semi-open position;

FIG. 2 is a rear elevational view thereof with the lid shown in the semi-open position;

FIG. 3 is a top plan view thereof with the lid shown in the closed position;

FIG. 4 is a right side elevational view thereof with the lid shown in the semi-open position with it being understood that the left side elevational view will be a mirror image thereof, and;

FIG. 5 is a front elevational view thereof with the lid shown in the semi-open position.

Referenced Cited
U.S. Patent Documents
D256028 July 22, 1980 Lawrence et al.
D269356 June 14, 1983 Yoshioka et al.
D283403 April 15, 1986 Chan
D290815 July 14, 1987 Fenne
D310094 August 21, 1990 Noguchi
Patent History
Patent number: D322812
Type: Grant
Filed: Nov 13, 1989
Date of Patent: Dec 31, 1991
Assignees: Alec S. Harwin (Virginia Beach, VA), Taylor M. Harwin (Virginia Beach, VA)
Inventor: Joan D. Harwin (Virginia Beach, VA)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Pamela Schmidt
Law Firm: Oldham & Oldham Company
Application Number: 7/435,796