US PATENT SUBCLASS 327 / 28
.~ By polarity

Current as of: June, 1999
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327 /   HD   MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS

1  DF  SPECIFIC SIGNAL DISCRIMINATING (E.G., COMPARING, SELECTING, ETC.) WITHOUT SUBSEQUENT CONTROL {11}
28.~ By polarity {2}
29  DF  .~.~> Selection of a particular polarity
30  DF  .~.~> Opposite polarity

DEFINITION

Classification: 327/28

By polarity:

(under subclass 1) Subject matter wherein the input signal parameter is its positive or negative orientation with respect to a fixed origin.