Patent
   D409098
Priority
Jul 28 1997
Filed
Jul 28 1997
Issued
May 04 1999
Expiry
May 04 2013
Assg.orig
Entity
unknown
6
3
n/a
The ornamental design for an adjustable unit circle oard for evaluating trigonometric functions and their signs, as shown and described.

FIG. 1 is a front elevational view of the adjustable unit circle board for evaluating trigonometric functions and their signs showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side view thereof

FIG. 4 is a left side view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

Michaeli, Shoshana

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7748129, Aug 31 2006 Apparatus and method for measuring the trigonometric cosine and trigonometric sine of an angle
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Patent Priority Assignee Title
3386190,
5114347, Apr 08 1991 Mathematical function demonstrator boards
D342685, Jun 11 1992 Trigonometric function overlay
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