US PATENT SUBCLASS 374 / 2
.~ By thermal radiation emitting device (e.g., blackbody cavity)

Current as of: June, 1999
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374 /   HD   THERMAL MEASURING AND TESTING

1  DF  THERMAL CALIBRATION SYSTEM {2}
2.~ By thermal radiation emitting device (e.g., blackbody cavity)

DEFINITION

Classification: 374/2

By thermal radiation emitting device (e.g. blackbody cavity):

(under subclass 1) Subject matter wherein a reference thermal condition is thermal radiation given off from a radiating element.

(1) Note. Such an element would include a blackened element adjacent a radiation transmitting element.

SEE OR SEARCH CLASS

250, Radiant Energy,

393, for an invisible radiant energy source used in electrical signalling.