US PATENT SUBCLASS 434 / 206
.~.~ Rotatable wheel-shaped element (e.g., ring, disc, cylinder, etc.) having indicia on perimeter thereof
Current as of:
June, 1999
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434 /
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EDUCATION AND DEMONSTRATION
188
DF
MATHEMATICS
{4}
191
DF
.~ Arithmetic {17}
206
.~.~ Rotatable wheel-shaped element (e.g., ring, disc, cylinder, etc.) having indicia on perimeter thereof
DEFINITION
Classification: 434/206
Rotatable wheel-shaped element (e.g.., ring, disk, cylinder, etc.) having indicia on perimeter thereof:
(under subclass 191) Subject matter including indicia such as numbers located on the circumference of a means having a circular cross section.
