US PATENT SUBCLASS 73 / 49.6
.~.~ With power-operated closure or seal

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

37  DF  WITH FLUID PRESSURE {8}
49.5  DF  .~ Pipe {1}
49.6.~.~ With power-operated closure or seal

DEFINITION

Classification: 73/49.6

(under subclass 49.5) Subject matter including power operated means for closing or sealing the pipe ends.