(under the class definition) Subject matter relating to means for converting electrical energy between the electrical and the mechanical state by means of an electromagnetic effect.
(1) Note. Consult the classes referred to in the search notes to this class for other classes having similar subject matter.
SEE OR SEARCH CLASS
330, Amplifiers,
58, for amplifiers including a rotating dynamoelectric machine as the active element thereof. See the Notes and Search Notes thereunder.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,
220+, for electromagnet with armature. 367, Communications, Electrical: Acoustic Wave Systems and Devices,
140+, for similar subject matter utilized in compressional wave sensing and detecting systems.
