Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B65
CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
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B65H
HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
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2511/00
Dimensions; Position; Numbers; Identification; Occurrences
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B65H2511/512
Marks, e.g. invisible to the human eye; Patterns
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