Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
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B23B
TURNING; BORING
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47/00
Constructional features of components specially designed for boring or drilling machines; Accessories therefor
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B23B47/28
Drill jigs for workpieces
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B23B47/284
Jigs for drilling rivets or bolts
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