US PATENT SUBCLASS 307 / 27
.~.~.~ Different frequencies

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

11  DF  PLURAL LOAD CIRCUIT SYSTEMS {8}
18  DF  .~ Plural sources of supply {5}
25  DF  .~.~ Diverse sources {3}
27.~.~.~ Different frequencies

DEFINITION

Classification: 307/27

(under subclass 25) Subject matter in which the diverse sources of energy have different frequencies.

SEE OR SEARCH THIS CLASS, SUBCLASS:

3, for this subject matter.