| D322812 |
Mathematical educational device
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| Patent Drawings: | |
| Inventor: |
Harwin |
| Date Issued: |
December 31, 1991 |
| Application: |
07/435,796 |
| Filed: |
November 13, 1989 |
| Inventors: |
Harwin; Joan D. (Virginia Beach, VA)
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| Assignee: |
Harwin; Alec S. (Virginia Beach, VA) |
| Primary Examiner: |
Burke; Wallace R. |
| Assistant Examiner: |
Schmidt; Pamela |
| Attorney Or Agent: |
Oldham & Oldham Company |
| U.S. Class: |
D19/59; D19/64 |
| Field Of Search: |
D19/59; D19/60; D19/61; D19/62; D19/63; D19/64; D10/40; D18/7; D21/13; D14/114; D14/100; D14/124; D14/137; 434/224; 434/227; 434/308; 434/195; 434/335; 434/322; 434/323; 434/324; 434/228; 434/365 |
| International Class: |
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| U.S Patent Documents: |
D256028; D269356; D283403; D290815; D310094 |
| Foreign Patent Documents: |
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| Other References: |
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| Abstract: |
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| Claim: |
The ornamental design for a mathematical educational device, as shown and described. |
| 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.
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