US PATENT SUBCLASS 73 / 152.35
.~.~.~.~ Magnetic

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

152.01  DF  BOREHOLE OR DRILLING (E.G., DRILL LOADING FACTOR, DRILLING RATE, RATE OF FLUID FLOW) {6}
152.18  DF  .~ Fluid flow measuring or fluid analysis {6}
152.29  DF  .~.~ Rate of fluid flow {5}
152.34  DF  .~.~.~ Rotary {1}
152.35.~.~.~.~ Magnetic

DEFINITION

Classification: 73/152.35

Magnetic:

(under subclass 152.34) Subject matter wherein motion of the rotary element is detected by sensing magnetic properties or wherein the apparatus includes means having magnetic properties.