| D333319 |
Teaching aid for children learning algebraic numbers
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| Patent Drawings: | |
| Inventor: |
Hwang |
| Date Issued: |
February 16, 1993 |
| Application: |
07/679,580 |
| Filed: |
April 3, 1991 |
| Inventors: |
Hwang; Faa C. (Tao Yuan Hsien, TW)
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| Assignee: |
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| Primary Examiner: |
Burke; Wallace R. |
| Assistant Examiner: |
Brown; Melody |
| Attorney Or Agent: |
Rosenberg; Morton J.Klein; David I. |
| U.S. Class: |
D19/64 |
| Field Of Search: |
D19/64; D19/61; D19/62; D19/59; 273/1.5A; D21/201; 434/248; 434/208 |
| International Class: |
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| U.S Patent Documents: |
D235897; D238440; D321392; 3204345; 3295229; 5060940 |
| Foreign Patent Documents: |
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| Other References: |
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| Abstract: |
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| Claim: |
The ornamental design for a teaching aid for children learning algebraic numbers, as shown and described. |
| Description: |
FIG. 1 is a perspective view from the front, top, and left side of a teaching aid for children learning algebraic numbers showing my design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a left side view thereof (the right side being a mirror image thereof); and,
FIG. 7 is a perspective view thereof, with the drawer in open condition containing ball-like objects.
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