Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B42
BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
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B42P
INDEXING SCHEME RELATING TO BOOKS, FILING APPLIANCES OR THE LIKE
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2241/00
Parts, details or accessories for books or filing appliances
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B42P2241/08
Perforations or slots that can cooperate with filing means as claws, rings or the like
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