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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B29D
PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
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99/00
Subject matter not provided for in other groups of this subclass
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B29D99/0025
Producing blades or the like, e.g. blades for turbines, propellers, or wings
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B29D99/0028
hollow blades
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