US PATENT SUBCLASS 338 / 225
.~ Carbon particles

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

223  DF  GRANULAR OR POWDERED ELEMENT {2}
225.~ Carbon particles

DEFINITION

Classification: 338/225

(under subclass 223) Subject matter wherein the granular or powdered material constituting the resistor element is substantially pure carbon.

(1) Note. Where the granular material is a carbon compound, classification is not here, but in the generic subclass 223 above.

SEE OR SEARCH THIS CLASS, SUBCLASS:

1, for a coherer type resistor with granular carbon particles.