Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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B21D
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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35/00
Combined processes according to; or processes combined with; methods covered by groups B21D1/00 - B21D31/00
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B21D35/001
Shaping combined with punching, e.g. stamping and perforating
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