Patent
   D333319
Priority
Apr 03 1991
Filed
Apr 03 1991
Issued
Feb 16 1993
Expiry
Feb 16 2007
Assg.orig
Entity
unknown
1
6
n/a
The ornamental design for a teaching aid for children learning algebraic numbers, as shown and described.

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.

Hwang, Faa C.

Patent Priority Assignee Title
D666023, Aug 30 2011 Intercontinental Great Brands LLC Display stand with net
Patent Priority Assignee Title
3204345,
3295229,
5060940, Aug 27 1990 Basketball shot return device
235897,
238440,
D321392, Apr 24 1989 Combined basketball goal, height measurer and clotheshorse or the like
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