(under subclass 2) Systems of distribution wherein the current source is alternating and is converted to an alternating current of different characteristics before reaching the point of use.
SEE OR SEARCH CLASS
307, Electrical Transmission or Interconnection Systems,
151, for miscellaneous conversion systems.
310, Electrical Generator or Motor Structure,
160, for dynamoelectric frequency converters.
363, Electric Power Conversion Systems, appropriate subclasses for electric power conversion systems, but particularly 148+, for phase conversion, and subclasses 157+ for frequency conversion.
