US PATENT SUBCLASS 73 / 1.69
.~.~ Using or containing liquid

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

1.01  DF  INSTRUMENT PROVING OR CALIBRATING {13}
1.57  DF  .~ Fluid pressure {7}
1.69.~.~ Using or containing liquid

DEFINITION

Classification: 73/1.69

Using or containing liquid:

(under subclass 1.57) Subject matter wherein either (a) the apparatus proving or calibrating the fluid pressure measuring device or the fluid pressure responsive device, (b) the pressure measuring means, or (c) the fluid pressure responsive means uses or includes a liquid.