US PATENT SUBCLASS 968 / 848
.~ Using pulses produced by radioisotopes [G04F 10/08]
Current as of:
June, 1999
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968 /
HD
HOROLOGY
844
DD
APPARATUS FOR MEASURING UNKNOWN TIME INTERVALS BY ELECTRIC MEANS (timing devices for clocks or watches for comparing the rate of the oscillating member with a standard subclass 769; radar systems, analogous systems G01S 9/00; measuring frequency G01R 23/00; measuring phase angle G01R 25/00) [G04F 10/00]
{5}
848
.~ Using pulses produced by radioisotopes [G04F 10/08]
