| Patents for G04F 10 - Apparatus for measuring unknown time intervals by electric means (2,136) |
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| 06/09/1982 | EP0053487A1 Test apparatus for signal timing measurement |
| 05/12/1982 | EP0051531A1 Apparatus for the precise dating of an event with regard to a time reference |
| 05/11/1982 | US4329030 Integrating time detector for photographic apparatus |
| 05/11/1982 | CA1123209A1 Real time clock using computer and separate counting means |
| 05/05/1982 | EP0051019A1 Counting device for high-frequency pulses |
| 04/06/1982 | US4323767 Repeatedly operable timer |
| 03/30/1982 | US4322832 Method and arrangement for pulse spacing measurement |
| 02/16/1982 | CA1118502A1 Double vernier time interval measurement using triggered phase-locked oscillators |
| 01/12/1982 | US4310795 Circuit measuring average period of periodic signal |
| 12/22/1981 | US4307449 Electronic time-counter for the diving |
| 12/02/1981 | EP0040952A1 Precision time duration detector |
| 12/01/1981 | US4303983 Method and apparatus for measuring time |
| 12/01/1981 | US4303850 Real time clock using computer and separate counting means |
| 11/24/1981 | US4302665 Circuit for measuring the duration of a pulse train, its use and circuit for its use |
| 11/17/1981 | US4301360 Time interval meter |
| 10/27/1981 | CA1111511A1 Pulse width measurement circuitry |
| 09/01/1981 | US4287585 Chronograph wristwatch |
| 05/26/1981 | US4270086 Electromagnetic plunger drop timer |
| 05/20/1981 | EP0028794A1 Arrangement for monitoring the functioning of a heating arrangement |
| 05/12/1981 | US4267436 Interval-expanding timer compensated for drift and nonlinearity |
| 04/14/1981 | US4262352 Electronic multifunction timepiece employing the PLA system |
| 03/18/1981 | EP0025086A2 Method and arrangement for measuring pulse separation of periodic pulse pairs |
| 03/03/1981 | US4254486 Display panel for electronic timepiece |
| 02/24/1981 | US4253175 Time data processing circuit for electronic timepiece |
| 02/24/1981 | CA1096502A1 Interactive wristwatch calculator |
| 01/20/1981 | US4246650 Multi-function electronic timepiece |
| 01/13/1981 | US4245334 Device for measuring and indicating the time between the reception of first and second airborne signals |
| 01/06/1981 | CA1093161A1 Counting circuits for multifrequency tone detectors |
| 01/06/1981 | CA1092836A1 Electronic timepiece with selective display of various time functions |
| 12/16/1980 | US4240154 Electronic digital stop watch |
| 12/09/1980 | US4238847 Electronic watch for yacht races |
| 12/02/1980 | US4236375 Electronic watch |
| 11/25/1980 | US4236238 Electronic digital timepiece having a stopwatch function and a timer function |
| 11/18/1980 | US4234845 Automatic control of arming signal for time interval measurements |
| 10/28/1980 | US4231090 Electronic game of adroitness incorporated in an electronic watch |
| 10/15/1980 | EP0017251A1 Circuitry for determining the mean period length of a periodical signal |
| 10/14/1980 | CA1087732A1 Display apparatus for automotive vehicles |
| 09/30/1980 | US4224789 Electronic timepiece |
| 09/23/1980 | US4223526 Electronic timepiece |
| 09/23/1980 | US4223525 Sequential display for digital chronograph |
| 09/09/1980 | US4221958 Electronic equipment for accessing by key operation |
| 07/08/1980 | US4211066 Stop watch |
| 07/01/1980 | US4209972 Digital electronic timepiece having an alarm display |
| 06/03/1980 | CA1078964A1 Interactive wristwatch calculator |
| 05/06/1980 | CA1076840A1 Automatic on/off digitally timed electronic switch |
| 04/22/1980 | CA1075917A1 Electronic stopwatch with elapsed time alarm |
| 04/08/1980 | US4197561 Portable recorder apparatus for recording time-related data |
| 04/08/1980 | US4196582 Control device for an electronic watch |
| 03/25/1980 | US4195220 Portable elapsed time recorder |
| 03/25/1980 | CA1074132A1 Integrated electronic watch circuits with a plurality of operational modes |
| 03/20/1980 | WO1980000503A1 Comparator for difference of order |
| 02/19/1980 | US4188825 Monitor for divers to avoid decompression |
| 02/19/1980 | CA1071878A1 Date display type electronic timepiece with stopwatch functions |
| 02/12/1980 | US4187671 Electronic watch with reaction timer |
| 01/22/1980 | US4184320 Electronic stop watches |
| 01/09/1980 | EP0006804A1 Precision decoder for the first pulse of a pair of pulses |
| 01/08/1980 | US4182110 Electronic wristwatch including auxiliary power supply |
| 12/11/1979 | US4178554 Phase difference detector |
| 11/27/1979 | US4176337 Apparatus for measuring the time between received pulses |
| 11/20/1979 | US4174606 Electronic watch having stopwatch function |
| 10/23/1979 | CA1065060A1 Cross-correlator circuit |
| 10/09/1979 | US4170105 Electronic timepiece |
| 09/18/1979 | US4168525 Universal timer |
| 09/18/1979 | US4168467 Measurement of pulse duration |
| 09/04/1979 | US4166360 Chronograph |
| 08/21/1979 | US4165459 Time interval measurement |
| 08/21/1979 | US4164844 Timepiece display indicator |
| 08/14/1979 | US4164666 Electronic apparatus using complementary MOS transistor dynamic clocked logic circuits |
| 08/14/1979 | US4164648 Double vernier time interval measurement using triggered phase-locked oscillators |
| 07/11/1979 | EP0002870A1 Chronometric installation with television picture taking device |
| 06/26/1979 | CA1057403A1 Apparatus for the analysis of the operation of a system using binary signals |
| 06/19/1979 | US4158285 Interactive wristwatch calculator |
| 04/17/1979 | US4150333 Electronic recorders |
| 03/06/1979 | US4142680 High resolution timing recording system |
| 12/12/1978 | US4129830 Counting process for time-to-digital converting circuits |
| 12/05/1978 | US4128892 Pulse width measurement circuitry |
| 09/12/1978 | US4112764 Automatic on/off digitally timed electronic switch |
| 09/05/1978 | US4112358 Digital frequency measuring device |
| 09/05/1978 | US4110966 Electronic timepiece with stop watch |
| 08/08/1978 | US4104864 Electronic timepiece |
| 08/08/1978 | US4104861 Electronic stop watch |
| 07/25/1978 | US4102631 Battery operated lighter equipped with a battery operated timepiece |
| 07/11/1978 | US4100490 Elapsed time indicator and electrolytic timer cell |
| 06/27/1978 | US4097801 Cross-correlator circuit |
| 06/27/1978 | US4097798 Oscilloscope sweep rate indicator system |
| 06/13/1978 | US4094138 Electronic chronograph |
| 05/16/1978 | US4090191 Counting circuit system for time-to-digital converter |
| 05/16/1978 | US4090141 Device for measuring the time interval separating the leading edges of two correlated pulses which have independent amplitudes and rise times |
| 05/16/1978 | US4090133 Digital time interval sensor using a free running counter and a cycle counter with only the latter being reset at each event |
| 05/16/1978 | US4089156 Stop watch device |
| 03/21/1978 | US4079583 Electrical chess clock |
| 02/28/1978 | US4077011 Uncertain interval timer using a variable length shift register |
| 02/14/1978 | US4074117 Timing system |
| 12/27/1977 | US4064736 Method and apparatus for measuring performance times of a shutter apparatus |
| 12/20/1977 | US4063409 Custom watch |
| 12/06/1977 | US4061016 Method and apparatus for measuring the foam life on an effervescent beverage |
| 11/22/1977 | US4058971 Digital wristwatch and stopwatch |
| 08/09/1977 | US4041281 Apparatus for the analysis of the operation of a system using binary signals |
| 07/12/1977 | US4035627 Scientific calculator |
| 07/12/1977 | US4034551 Safety feature for function control circuit |