US PATENT SUBCLASS 367 / 85
.~.~ Linear valve control

Current as of: June, 1999
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367 /   HD   COMMUNICATIONS, ELECTRICAL: ACOUSTIC WAVE SYSTEMS AND DEVICES

81  DF  WELLBORE TELEMETERING {2}
83  DF  .~ Through well fluids {2}
85.~.~ Linear valve control

DEFINITION

Classification: 367/85

Linear valve control:

(under subclass 83) Subject matter wherein the acoustic waves are created by linear movement of structure which modulates the flow of well fluid.