US PATENT SUBCLASS 600 / 540
.~.~.~ Breath exhaled into or inhaled from expansible chamber

Current as of: June, 1999
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600 /   HD   SURGERY

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

DEFINITION

Classification: 600/540

Breath exhaled into or inhaled from expansible chamber:

(under subclass 538) Subject matter wherein breath flow or lung capacity is measured by breathing gas into or from an expansible chamber.

SEE OR SEARCH CLASS

92, Expansible Chamber Devices,

34+, for a bellows-type expansible chamber.