US PATENT SUBCLASS 307 / 128
.~.~.~ AC or DC discriminating

Current as of: June, 1999
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307 /   HD   ELECTRICAL TRANSMISSION OR INTERCONNECTION SYSTEMS

112  DF  SWITCHING SYSTEMS {5}
116  DF  .~ Condition responsive {4}
125  DF  .~.~ Electrical {6}
128.~.~.~ AC or DC discriminating

DEFINITION

Classification: 307/128

(under subclass 125) Subject matter having a discrimination response to alternating current and direct current conditions.

(1) Note. This subclass relates, for example, to systems wherein a switching operation automatically takes place to accommodate the system to change of the source of power when the source changes between alternating and direct current conditions.