US PATENT SUBCLASS 366 / 75
.~ With specified vent means

Current as of: June, 1999
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366 /   HD   AGITATING

69  DF  RUBBER OR HEAVY PLASTIC WORKING {14}
75.~ With specified vent means

DEFINITION

Classification: 366/75

With specified vent means:

(under subclass 69) Subject matter including means in said mixing chamber or in a stirrer for releasing gas from said mixing chamber.