Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B67
OPENING, CLOSING; OR CLEANING; BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
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B67C
CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
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B67C11/02
without discharge valves
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B67C2011/027
for filling oil into engines
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