US PATENT SUBCLASS 968 / 562
.~.~ Automatic stabilization of net frequency with regard to time, e.g., by comparing one of the clocks with an independent clock, means being provided for automatic compensation of disturbances, etc. [G04C 15/00H3]


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



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}
562.~.~ Automatic stabilization of net frequency with regard to time, e.g., by comparing one of the clocks with an independent clock, means being provided for automatic compensation of disturbances, etc. [G04C 15/00H3]