US PATENT SUBCLASS 968 / 480
.~ Wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g., by a tuning fork, e.g., electrostatically, etc. [G04C 3/08]

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

446  DD  ELECTROMECHANICAL CLOCKS OR WATCHES INDEPENDENT OF OTHER TIMEPIECES AND IN WHICH THE MOVEMENT IS MAINTAINED BY ELECTRIC MEANS (synchronization subclass 506) [G04C 3/00] {8}
480.~ Wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g., by a tuning fork, e.g., electrostatically, etc. [G04C 3/08] {2}
481  DD  .~.~> Driven by electromagnetic means [G04C 3/10] {2}
488  DD  .~.~> Driven by piezoelectric means; driven by magnetostrictive means [G04C 3/12] {1}