US PATENT SUBCLASS 434 / 192
.~.~ Chalkboard or equivalent means having readily erasable surface


Current as of: June, 1999
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434 /   HD   EDUCATION AND DEMONSTRATION

188  DF  MATHEMATICS {4}
191  DF  .~ Arithmetic {17}
192.~.~ Chalkboard or equivalent means having readily erasable surface


DEFINITION

Classification: 434/192

Chalkboard or equivalent means having readily erasable surface:

(under subclass 191) Subject matter including a panel having a surface from which marks made by chalk or other means can easily be erased.

SEE OR SEARCH THIS CLASS, SUBCLASS:

408+, for chalkboards and equivalent readily erasable means.