US PATENT SUBCLASS 261 / 82
.~.~ Piston

Current as of: June, 1999
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261 /   HD   GAS AND LIQUID CONTACT APPARATUS

75  DF  CONTACT DEVICES {11}
81  DF  .~ Reciprocating {1}
82.~.~ Piston

DEFINITION

Classification: 261/82

Including a reciprocating piston impelling the gases and liquids into contact with baffles, screens or other mingling or agitating devices.