Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B42
BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
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B42F
SHEETS TEMPORARILY ATTACHED TOGETHER; FILING APPLIANCES; FILE CARDS; INDEXING
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1/00
Sheets temporarily attached together without perforating; Means therefor
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B42F1/02
Paper-clips or like fasteners
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B42F1/08
of round cross-section; , e.g. made of wire
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