US PATENT SUBCLASS 708 / 702
.~.~.~.~.~ Field-Effect transistor (FET)

Current as of: June, 1999
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708 /   HD   ELECTRICAL COMPUTERS: ARITHMETIC PROCESSING AND CALCULATING

100  DF  ELECTRICAL DIGITAL CALCULATING COMPUTER {10}
200  DF  .~ Particular function performed {26}
490  DF  .~.~ Arithmetical operation {27}
670  DF  .~.~.~ Addition/subtraction {11}
700  DF  .~.~.~.~ Binary {6}
702.~.~.~.~.~ Field-Effect transistor (FET)

DEFINITION

Classification: 708/702

Field-Effect Transistor (FET):

(under subclass 700) Subject matter including a transistor in which current carriers (holes or electrons) are injected at one terminal (the source) and pass to another (the drain) through a channel of semiconductor material whose resistivity depends mainly on the extent to which it is penetrated by a depletion region.