Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
Load children
B42
BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
Load children
B42F
SHEETS TEMPORARILY ATTACHED TOGETHER; FILING APPLIANCES; FILE CARDS; INDEXING
Load children
17/00
Card-filing arrangements, e.g. card indexes or catalogues or filing cabinets
Load children Filter patents View analytics View as hierarchy
B42F17/30
modified for particular uses
Filter patents View analytics View as hierarchy