US PATENT SUBCLASS 327 / 572
.~.~ Secondary emissive type

Current as of: June, 1999
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327 /   HD   MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS

524  DF  SPECIFIC IDENTIFIABLE DEVICE, CIRCUIT, OR SYSTEM {22}
568  DF  .~ Negative resistance type {4}
572.~.~ Secondary emissive type {1}
573  DF  .~.~.~> Electron multiplier type

DEFINITION

Classification: 327/572

Secondary emissive type:

(under subclass 568) Subject matter which includes an electron space discharge device which relies upon the phenomenon of the release of electrons from a structure which has been impacted by other high-velocity electrons.

SEE OR SEARCH CLASS

330, Amplifiers,

42, for amplifiers utilizing secondary emission tubes.

331, Oscillators,

133, for oscillatory circuits utilizing a secondary emissive tube such as a dynatron.