US PATENT SUBCLASS 312 / 230
WITH ERASABLE SURFACE (E.G., BLACKBOARD)
Current as of:
June, 1999
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312 /
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SUPPORTS: CABINET STRUCTURE
230
WITH ERASABLE SURFACE (E.G., BLACKBOARD)
DEFINITION
Classification: 312/230
(under the class definition) Structures having an erasable surface, (e.g., a blackboard) as a part of the combination.
SEE OR SEARCH CLASS
434, Education and Demonstration,
408+, for such subject matter without cabinet features.