US PATENT SUBCLASS 307 / 23
.~.~ Substitute or alternate source

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}
23.~.~ Substitute or alternate source

DEFINITION

Classification: 307/23

(under subclass 18) Subject matter having a substitute or an alternate source of energy.

(1) Note. This substitute or alternate source of energy, for example, may be a standby generator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

64+, for this subject matter.

SEE OR SEARCH CLASS

333, Wave Transmission Lines and Networks, 3, for plural channel communication systems having means to automatically substitute one channel for another.