| Patents for G04F 10 - Apparatus for measuring unknown time intervals by electric means (2,136) |
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| 07/11/1989 | US4847483 Device for measuring light intensity received by a photosensor |
| 07/04/1989 | US4845692 Clocking device of substantially constant stability for short-term and long-term time measurement |
| 07/04/1989 | US4845690 Multiple screen ballistic chronograph |
| 06/20/1989 | US4841497 Digital time base with corrected analog interpolation |
| 04/18/1989 | US4823293 Correlation time-difference detector |
| 04/04/1989 | US4817432 Digital ultrasonic instrument for ophthalmic use |
| 04/04/1989 | CA1251937A1 Timer calibration method and apparatus |
| 03/29/1989 | CN2035107U Needle optical electric time or speed counter |
| 03/21/1989 | US4814689 Method of measuring a cable delay time |
| 02/15/1989 | CN2032737U Electronic chronoscope |
| 02/09/1989 | WO1989001191A1 Method and apparatus for asynchronous time measurement |
| 01/31/1989 | US4802194 Time measuring system with large dynamic range |
| 01/25/1989 | EP0300757A2 Time measurement apparatus |
| 01/24/1989 | USRE32845 Period and frequency measuring instrument |
| 01/10/1989 | US4797864 Race stopwatch with plural displays and operating modes |
| 01/10/1989 | US4797679 Radio direction-finding using time of arrival measurements |
| 12/28/1988 | CN88103184A Midpoint detection technology and shortwave time-signal timing instrument |
| 12/14/1988 | EP0294938A2 Exponential decay time constant measurement using frequency of offset-phase locked loop: system and method |
| 12/14/1988 | CN88211218U Indicating gauge for time of electric current |
| 11/23/1988 | EP0291627A2 Method and device for determining the time between the start and finish of competitors and the like |
| 11/08/1988 | US4783773 Regatta timing watch |
| 11/08/1988 | US4783755 Interval timer circuit |
| 11/02/1988 | EP0289385A1 Reference time device with a constant stability for measuring long and short time intervals |
| 10/20/1988 | WO1988008173A1 Automatic parking time indicator for motor vehicles |
| 10/04/1988 | US4775801 Electronic timer |
| 10/04/1988 | US4775244 Method and apparatus for measurement of pulse width of very short pulses |
| 09/20/1988 | US4772843 For converting the pulse width of an interpolation pulse to voltage |
| 09/06/1988 | US4769798 Successive period-to-voltage converting apparatus |
| 09/06/1988 | US4769797 Stop watch |
| 08/16/1988 | US4764694 Interpolating time-measurement apparatus |
| 08/10/1988 | EP0277638A2 Successive period-to-voltage converting apparatus |
| 07/20/1988 | CN85108362A Method of phase-opening time counting and its equipments |
| 06/01/1988 | DE3640589A1 Device in a vehicle to determine and display parking time, with parking time assignment |
| 05/25/1988 | EP0268255A2 Stop watch |
| 05/10/1988 | US4743971 Apparatus for timing sporting events |
| 04/19/1988 | US4739279 Method and a device for rapid adjustment of the phase of a clock signal in rapid phase |
| 04/19/1988 | US4738268 For measuring and recording intrauterine pressure |
| 04/12/1988 | US4737942 Time measuring device |
| 04/05/1988 | US4736351 Precision semiconductor device timer |
| 03/29/1988 | US4734587 Optoelectric distance measuring apparatus with a time discriminator for the accurate detection of electric pulse sequence |
| 03/02/1988 | EP0257292A1 Opto-electronic device for measuring distance according to the principle of the measurement of echo return time |
| 03/01/1988 | CA1233570A1 Real time usage indicator for a processor system |
| 02/17/1988 | CN87206979U Cage digital second range measurer |
| 01/19/1988 | US4720822 High frequency signal measurement method and apparatus |
| 01/12/1988 | US4719608 Ultra high-speed time-to-digital converter |
| 01/07/1988 | EP0250682A2 Pulse measurement circuit |
| 01/06/1988 | CN87205937U Carrier pigeon flight-competition timer |
| 12/29/1987 | US4716363 Exponential decay time constant measurement using frequency of offset phase-locked loop: system and method |
| 12/16/1987 | EP0249292A2 Radio direction-finding using time of arrival measurements |
| 12/08/1987 | US4712195 For connection to a source of supply voltage |
| 12/08/1987 | US4712061 Small propagation delay measurement for digital logic |
| 11/11/1987 | EP0244642A2 Solid-state cumulative operation measurement system |
| 11/03/1987 | US4704036 Pulse measurement circuit |
| 10/22/1987 | DE3612686A1 Method and device for measuring time intervals |
| 10/21/1987 | EP0241648A2 Electronic non-volatile elapsed time meter |
| 10/07/1987 | EP0240336A2 Method and system for generating a description of the distribution of looking time as people watch television commercials |
| 09/24/1987 | DE3640189C1 Device for determining the time interval between repetitive events and signals triggered by these events |
| 09/22/1987 | US4695781 Digital time interval measuring apparatus |
| 09/16/1987 | EP0236876A2 Apparatus and method for high-frequency signal measurement |
| 08/25/1987 | US4688947 Method and apparatus for characterizing propagation delays of integrated circuit devices |
| 08/12/1987 | CN85205459U Digital instrument for measuring time and velocity of swimming action at the starting section |
| 08/12/1987 | CN85205458U Digital detector for swimming relay bar |
| 07/22/1987 | EP0229505A1 A method of measuring a cable delay time |
| 06/30/1987 | US4677580 Real time usage indicator for a processor system |
| 06/30/1987 | US4676660 Method and apparatus for generating a timing signal in a time-of-arrival detection system |
| 05/27/1987 | EP0223119A1 Track running timing device |
| 05/20/1987 | EP0222476A2 Apparatus for latching data on the occurrence of asynchronous signals |
| 05/05/1987 | USH276 Optical time break detector |
| 03/24/1987 | US4652139 Electronic non-volatile elapsed time meter |
| 03/11/1987 | CN85105686A Apparatus for mfg. lighting time interval |
| 03/03/1987 | US4647216 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 |
| 02/03/1987 | US4640624 Time computer and display device |
| 01/20/1987 | US4637733 High-resolution electronic chronometry system |
| 12/23/1986 | US4630935 Other time instrument |
| 12/09/1986 | US4627268 Method for calibrating instruments for time interval measurements |
| 11/04/1986 | US4620788 Apparatus for measuring pulse signal delay interval |
| 10/15/1986 | EP0197801A2 Method and device for quickly setting the phase of a clock signal at a predetermined value |
| 10/07/1986 | US4616208 System for indicating operation time of motor vehicles and the like |
| 10/07/1986 | US4615617 Pulse delay measurement apparatus |
| 09/23/1986 | US4613951 Time interval measuring apparatus and method |
| 09/23/1986 | US4613950 Self-calibrating time interval meter |
| 09/17/1986 | EP0194643A2 Correlation time-difference detector |
| 09/16/1986 | US4612655 Driving time alarm for vehicle |
| 09/16/1986 | US4611926 Time interval measuring instrument |
| 09/16/1986 | CA1211552A1 System and method of seismic exploration |
| 09/10/1986 | EP0193724A2 Method and apparatus for the calibration of a time-measuring device |
| 09/09/1986 | US4610549 Method and apparatus for generating a timing signal in a time-of-arrival detection system |
| 08/05/1986 | US4604536 Timing circuits |
| 07/29/1986 | CA1208734A1 Method and an apparatus for measuring distant echo delay in an echo cancelling arrangement |
| 07/15/1986 | US4600959 Tape measuring method |
| 07/15/1986 | CA1207848A1 Ac parametric circuit |
| 07/08/1986 | US4598575 Timer calibration method and apparatus |
| 07/02/1986 | CA1207082A Electronic music pace and distance counting shoe |
| 07/01/1986 | US4598375 Time measuring circuit |
| 06/04/1986 | EP0182834A1 Optoelectric distance measuring apparatus with a time discriminator for the accurate detection of the electric pulse sequence |
| 05/21/1986 | CN85203808U Micro-computer controling measuring device for responding time of electric door |
| 05/06/1986 | CA1203994A1 Apparatus for measuring the luminous lifetime of samples |
| 04/22/1986 | US4584651 Process controller with power outage analysis capability |
| 04/22/1986 | US4584489 Multichannel time-voltage converter |
| 03/18/1986 | US4577309 Method and apparatus for measuring distant echo delay in an echo cancelling arrangement |