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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29/00
Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
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B41J29/38
Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
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B41J29/393
Devices for controlling or analysing the entire machine; ; Controlling or analysing mechanical parameters involving printing of test patterns
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B41J2029/3935
by means of printed test patterns
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