Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B41
PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
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B41M
PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING,
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2205/00
Printing methods or features related to printing methods; Location or type of the layers
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B41M2205/30
Thermal donors, e.g. thermal ribbons
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