US PATENT SUBCLASS 307 / 64
.~ Substitute or emergency source

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

43  DF  PLURAL SUPPLY CIRCUITS OR SOURCES {14}
64.~ Substitute or emergency source {3}
65  DF  .~.~> Plural substitute sources
66  DF  .~.~> Storage battery or accumulator {1}
68  DF  .~.~> Dynamoelectric

DEFINITION

Classification: 307/64

(under subclass 43) Subject matter having substitute or emergency sources of electric energy.

SEE OR SEARCH THIS CLASS, SUBCLASS:

23, for this subject matter.

SEE OR SEARCH CLASS

315, Electric Lamp and Discharge Devices: Systems,

86+, for lamp and space discharge device systems having means for automatically substituting one power supply for another. 340, Communications: Electrical,

333, for miscellaneous signal communication systems having means for substituting one power supply for another.