Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
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B23G
THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
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1/00
Thread cutting; Automatic machines specially designed therefor
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B23G1/44
Equipment or accessories specially designed for machines or devices for thread cutting
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B23G1/52
for operating on pipes or tubes
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