Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B43
WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
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B43L
ARTICLES FOR WRITING OR DRAWING UPON;; WRITING OR DRAWING AIDS;; ACCESSORIES FOR WRITING OR DRAWING
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1/00
Repeatedly-usable boards or tablets for writing or drawing
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B43L1/12
having translucent writing surfaces producing visual impressions by co-operation with backing members
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B43L1/123
Flexible writing surface or backing
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