US PATENT SUBCLASS 307 / 13
.~.~ Polyphase

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

11  DF  PLURAL LOAD CIRCUIT SYSTEMS {8}
12  DF  .~ Common conductor or return type {3}
13.~.~ Polyphase {1}
14  DF  .~.~.~> Phase balancing

DEFINITION

Classification: 307/13

(under subclass 12) Subject matter relating to polyphase systems.

SEE OR SEARCH CLASS

315, Electric Lamp and Discharge Devices: Systems,

137+, for polyphase systems for energizing space discharge devices or lamps.

323, Electricity: Power Supply or Regulation Systems, appropriate subclasses for voltage control polyphase systems. Note section VIII, subsection B of the class definition for a statement of the line between polyphase voltage control systems to be found in Class 323 and elsewhere.

363, Electric Power Conversion Systems,

1+, and 148+ for phase conversion systems for converting one number of phases to another number of phases.