Description
Class G04C : ELECTROMECHANICAL CLOCKS OR WATCHES
Subclass 3/027: Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means (clocks driven by synchronous motors G04C 15/00) wherein movement is regulated by a pendulum using electromagnetic coupling between electric power source and pendulum (G04C 3/033 takes precedence)