US PATENT SUBCLASS 600 / 542
.~.~.~.~ Liquid surface forms portion of chamber boundary

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

Internet Version by PATENTEC © 1999      Terms of Use


600 /   HD   SURGERY

300  DF  DIAGNOSTIC TESTING {38}
529  DF  .~ Respiratory {8}
538  DF  .~.~ Measuring breath flow or lung capacity {2}
540  DF  .~.~.~ Breath exhaled into or inhaled from expansible chamber {2}
542.~.~.~.~ Liquid surface forms portion of chamber boundary

DEFINITION

Classification: 600/542

Liquid surface forms portion of chamber boundary:

(under subclass 540) Subject matter wherein a portion of the boundary of the expansible chamber is defined by a liquid surface, as in an expansible chamber formed by an inverted cup having its side wall immersed in a liquid.