Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
Load children
B41
PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
Load children
B41P
INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
Load children
2231/00
Inking devices; Recovering printing ink
Load children Filter patents View analytics View as hierarchy
B41P2231/20
Recovering printing ink
Load children Filter patents View analytics View as hierarchy