US PATENT SUBCLASS 338 / 15
.~ Photoconductive (e.g., light sensitive)

Current as of: June, 1999
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338 /   HD   ELECTRICAL RESISTORS

13  DF  RESISTANCE VALUE RESPONSIVE TO A CONDITION {10}
15.~ Photoconductive (e.g., light sensitive) {4}
16  DF  .~.~> With vibration control
17  DF  .~.~> Plural resistance elements (e.g., mosaic)
18  DF  .~.~> Infrared radiation
19  DF  .~.~> With transparent housing

DEFINITION

Classification: 338/15

(under subclass 13) Subject matter wherein the resistor is formed of a material whose resistance value changes materially upon the application of light, infrared radiation, or ultraviolet radiation to the resistor, or upon a change in the intensity of this radiation applied to the resistor together with any structure which facilitates the application of light or ultra violet or infrared radiation to the resistor.

SEE OR SEARCH CLASS

136, Batteries: Thermoelectric and Photoelectric,

89, for primary photoelectric batteries.

250, Radiant Energy,

200+, for photocell circuits and apparatus.

252, Compositions, 501, for light sensitive conductive compositions.

374, Thermal Measuring and Testing,

121+, for radiation type thermometers.