Incorporating A Stepping Motor (subclasses 302 To 488 Take Precedence) Generating Timing Pulses Subclasses 817 And 901; Setting Subclass 906; Synchronization Subclass 920; Generating Commutating Pulses In Masterclocks Subclasses 525 And 541; Slave Clocks Actuated Intermittently By Electromechanical Step-advancing Mechanisms Subclass 548; Control Circuits For Stepping Motors In General H02p 8/00) [g04c 3/14] Patents (Class 968/490)