US PATENT SUBCLASS 281 / 39
.~.~ Erasable surface

Current as of: June, 1999
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281 /   HD   BOOKS, STRIPS, AND LEAVES

15.1  DF  BOOK, ELEMENT THEREOF, OR ACCESSORY THEREFOR {9}
38  DF  .~ Leaves {3}
39.~.~ Erasable surface

DEFINITION

Classification: 281/39

Leaves in combination with elements bearing erasable features, also leaves having parts modified so as to be erasable surfaces.

SEE OR SEARCH CLASS

434, Education and Demonstration

408+, for elements having or bearing erasable surfaces.