Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B22
CASTING; POWDER METALLURGY
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B22F
WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
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5/00
Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
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B22F5/10
of articles with cavities or holes, not otherwise provided for in the preceding subgroups
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