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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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24/00
Special deep-drawing arrangements in, or in connection with, presses
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B21D24/10
Devices controlling or operating blank holders independently, or in conjunction with dies
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B21D24/14
pneumatically or hydraulically
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