Patent
   D373144
Priority
Jun 06 1994
Filed
Jun 06 1994
Issued
Aug 27 1996
Expiry
Aug 27 2010
Assg.orig
Entity
unknown
2
11
n/a
The ornamental design for the mathematic teaching rack, as shown and described.

FIG. 1 is a front elevational view of the mathematic teaching rack showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a frontn perspective view thereof.

The broken lines shown in FIGS. 5 and 7 are for illustrative purposes only and form no part of the claimed design.

Hansen, Alice M.

Patent Priority Assignee Title
8021159, Mar 18 2008 STRING MATH, LLC String math manipulative system and method
8851894, Mar 18 2008 Double-sided, front-to-back-aligned, tactile learning aid
Patent Priority Assignee Title
3455034,
3811205,
3995378, Jul 12 1974 Mathematics visual teaching aid
4233757, Sep 05 1978 Mathematics device
4812124, Feb 19 1988 CLOPPER, LAWRENCE A III, 39-70 46TH STREET-SUNNYSIDE, NY Hexadecimal abacus
4884973, Jan 18 1989 Mathematic teaching aid
5205747, May 13 1992 Bead calculator educational toy
149083,
169562,
184042,
D300040, Feb 18 1986 Keyboard guide
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