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Class Information
Number: 968/846
Name: Horology > 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] > By counting pulses or half cycles of an alternating current [g04f 10/04]
Description:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4958362 |
Clock signal generating circuit |
Sep. 18, 1990 |
| 4908784 |
Method and apparatus for asynchronous time measurement |
Mar. 13, 1990 |
| 4802194 |
Time measuring system with large dynamic range |
Jan. 31, 1989 |
| RE32845 |
Period and frequency measuring instrument |
Jan. 24, 1989 |
| 4769797 |
Stop watch |
Sep. 6, 1988 |
| 4764694 |
Interpolating time-measurement apparatus |
Aug. 16, 1988 |
| 4738268 |
Relative time clock |
Apr. 19, 1988 |
| 4737942 |
Time measuring device |
Apr. 12, 1988 |
| 4695781 |
Digital time interval measuring apparatus |
Sep. 22, 1987 |
| 4652139 |
Electronic non-volatile elapsed time meter |
Mar. 24, 1987 |
| 4647216 |
Apparatus and method for measuring the time elapsed in increasing or in decreasing vehicle speed from one predetermined speed to a second, higher or lower predetermined speed |
Mar. 3, 1987 |
| 4630935 |
Other time instrument |
Dec. 23, 1986 |
| 4620788 |
Apparatus for measuring pulse signal delay interval |
Nov. 4, 1986 |
| 4615617 |
Pulse delay measurement apparatus |
Oct. 7, 1986 |
| 4611926 |
Time interval measuring instrument |
Sep. 16, 1986 |
| 4564918 |
Method and apparatus for measuring the time difference between two sampling times |
Jan. 14, 1986 |
| 4553836 |
Method and apparatus for electrooptical distance measurement |
Nov. 19, 1985 |
| 4546487 |
Auto ranging counter |
Oct. 8, 1985 |
| 4544884 |
Period and frequency measuring instrument |
Oct. 1, 1985 |
| 4533256 |
Dive timer |
Aug. 6, 1985 |
| 4514835 |
Device for measuring time intervals between a plurality of successive events |
Apr. 30, 1985 |
| 4511999 |
Gun shot control unit for seismic exploration |
Apr. 16, 1985 |
| 4505595 |
Dual timing event stopwatch |
Mar. 19, 1985 |
| 4499589 |
Counter circuit for counting high frequency pulses using the combination of a synchronous and an asynchronous counter |
Feb. 12, 1985 |
| 4486847 |
Watch provided with a microcomputer |
Dec. 4, 1984 |
| 4478521 |
Digital time meter |
Oct. 23, 1984 |
| 4472067 |
Chess clock |
Sep. 18, 1984 |
| 4468746 |
Apparatus for determining interval between two events |
Aug. 28, 1984 |
| 4408895 |
Apparatus for accurately timing an event relative to clock signals |
Oct. 11, 1983 |
| 4400090 |
Chugometer |
Aug. 23, 1983 |
| 4367051 |
Relative time interval measuring instrument |
Jan. 4, 1983 |
| 4364669 |
Chronographic watch |
Dec. 21, 1982 |
| 4350953 |
Time interval measurement apparatus |
Sep. 21, 1982 |
| 4310795 |
Circuit measuring average period of periodic signal |
Jan. 12, 1982 |
| 4302665 |
Circuit for measuring the duration of a pulse train, its use and circuit for its use |
Nov. 24, 1981 |
| 4287585 |
Chronograph wristwatch |
Sep. 1, 1981 |
| 4270086 |
Electromagnetic plunger drop timer |
May. 26, 1981 |
| 4245334 |
Device for measuring and indicating the time between the reception of first and second airborne signals |
Jan. 13, 1981 |
| 4196582 |
Control device for an electronic watch |
Apr. 8, 1980 |
| 4195220 |
Portable elapsed time recorder |
Mar. 25, 1980 |
| 4188825 |
Monitor for divers to avoid decompression |
Feb. 19, 1980 |
| 4187671 |
Electronic watch with reaction timer |
Feb. 12, 1980 |
| 4184320 |
Electronic stop watches |
Jan. 22, 1980 |
| 4174606 |
Electronic watch having stopwatch function |
Nov. 20, 1979 |
| 4168467 |
Measurement of pulse duration |
Sep. 18, 1979 |
| 4168525 |
Universal timer |
Sep. 18, 1979 |
| 4166360 |
Chronograph |
Sep. 4, 1979 |
| 4164844 |
Timepiece display indicator |
Aug. 21, 1979 |
| 4158285 |
Interactive wristwatch calculator |
Jun. 19, 1979 |
| 4150333 |
Electronic recorders |
Apr. 17, 1979 |
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