US PATENT SUBCLASS 434 / 417
.~.~ Chalkboard cleaning means, chalk or eraser holder, or chalk dust receiver

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

365  DF  MEANS FOR DEMONSTRATING APPARATUS, PRODUCT, OR SURFACE CONFIGURATION, OR FOR DISPLAYING EDUCATION MATERIAL OR STUDENT'S WORK {37}
408  DF  .~ Chalkboard or equivalent means having easily erasable surface {14}
417.~.~ Chalkboard cleaning means, chalk or eraser holder, or chalk dust receiver

DEFINITION

Classification: 434/417

Chalkboard cleaning means, chalk or eraser holder, or chalk dust receiver:

(under subclass 408) Subject matter including means for removing markings from the panel, means for holding chalk or an eraser, or means for catching chalk powder.