US PATENT SUBCLASS 968 / 837
APPARATUS FOR MEASURING UNKNOWN TIME INTERVALS BY ELECTROMECHANICAL MEANS [G04F 8/00]


Current as of: June, 1999
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968 /   HD   HOROLOGY

837APPARATUS FOR MEASURING UNKNOWN TIME INTERVALS BY ELECTROMECHANICAL MEANS [G04F 8/00] {4}
838  DD  .~> Using continuously running driving means [G04F 8/00B]
839  DD  .~> Running only during the time intervals to be measured, e.g., stopwatch, etc. [G04F 8/00C]
840  DD  .~> Using an electromechanical oscillator (subclasses 817 and 844 take precedence) [G04F 8/02] {2}
843  DD  .~> Means used apart from the timepiece for starting or stopping same [G04F 8/08]