Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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B29K
INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR; MOULDS,; REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
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2311/00
Use of natural products or their composites, not provided for in groups B29K2201/00 - B29K2309/00, as reinforcement
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B29K2311/12
Paper, e.g. cardboard
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