US PATENT SUBCLASS 250 / 338.3
.~.~ Pyroelectric type

Current as of: June, 1999
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250 /   HD   RADIANT ENERGY

336.1  DF  INVISIBLE RADIANT ENERGY RESPONSIVE ELECTRIC SIGNALLING {16}
338.1  DF  .~ Infrared responsive {12}
338.3.~.~ Pyroelectric type

DEFINITION

Classification: 250/338.3

Pyroelectric type:

(under subclass 338.1) Subject matter including a material wherein a change in the intensity of absorbed incident radiation produces an electric signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

332+, for infrared-to-visible imaging with a pyroelectric target.

SEE OR SEARCH CLASS

136, Batteries: Thermoelectric and Photoelectric,

213, for radiation pyrometers.

313, Electric Lamp and Discharge Devices,

388, for cathode ray tubes with a pyroelectric target.