US PATENT SUBCLASS 251 / 320
.~.~ Biased

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


251 /   HD   VALVES AND VALVE ACTUATION

318  DF  RECIPROCATING VALVE {7}
319  DF  .~ Push or pull operator {1}
320.~.~ Biased {1}
321  DF  .~.~.~> Spring {2}

DEFINITION

Classification: 251/320

(under subclass 319) Valves biased or urged to one position.