US PATENT SUBCLASS 307 / 21
.~.~.~ Diverse sources

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}
19  DF  .~.~ Interconnected for energy transfer {2}
21.~.~.~ Diverse sources {1}
22  DF  .~.~.~.~> AC and DC

DEFINITION

Classification: 307/21

(under subclass 19) Subject matter having diverse sources of energy supply.

(1) Note. The diverse sources, for example, may be two alternating current transmission systems of different frequency which are not interconnected otherwise than by the circuits related to the subject matter of the subclass.