US PATENT SUBCLASS 968 / 561-- .~.~ Setting the time-indicating means, e.g., by controlling the frequency or by changing the drive of the separate clocks by using an auxiliary motor, etc. [G04C 15/00H2]

US PATENT SUBCLASS 968 / 561
.~.~ Setting the time-indicating means, e.g., by controlling the frequency or by changing the drive of the separate clocks by using an auxiliary motor, etc. [G04C 15/00H2]

968 /	HD	HOROLOGY

553	DD	CLOCKS DRIVEN BY SYNCHRONOUS MOTORS [G04C 15/00] {4}
560	DD	.~ Synchronous clock systems, e.g., provided with radiolink or using transmission of alternating current via existing power distribution lines, etc. [G04C 15/00H] {2}
561		.~.~ Setting the time-indicating means, e.g., by controlling the frequency or by changing the drive of the separate clocks by using an auxiliary motor, etc. [G04C 15/00H2]