Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
Load children
B41
PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
Load children
B41J
TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
Load children
33/00
Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material
Load children Filter patents View analytics View as hierarchy
B41J33/14
Ribbon-feed devices or mechanisms
Load children Filter patents View analytics View as hierarchy
B41J33/54
for ensuring maximum life of the ribbon
Load children Filter patents View analytics View as hierarchy