Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B41
PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
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B41J
TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
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3/00
Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
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B41J3/28
for printing downwardly on flat surfaces, e.g. of books, drawings, boxes; , envelopes, e.g. flat-bed ink-jet printers
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