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Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
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PITCHING OR DEPITCHING MACHINES; CELLAR TOOLS (cleaning of casks B08B 9/00)
Pitching or depitching machines
Venting devices for casks, barrels, or the like
Cellar tools
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Last Modified: 10/10/2013