| Patents for G04F 5 - Apparatus for producing preselected time intervals for use as timing standards (1,270) |
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| 01/19/1994 | EP0579259A1 Atomic frequency standard cell and method for forming same |
| 01/18/1994 | CA2098966A1 Atomic frequency standard cell and method for forming same |
| 01/04/1994 | US5275082 Visual music conducting device |
| 12/07/1993 | US5268881 Compensator for a mechanical pendulum clock |
| 10/26/1993 | US5256995 Low helium permeability atomic frequency standard cell and method for forming same |
| 09/28/1993 | US5248883 Ion traps of mono- or multi-planar geometry and planar ion trap devices |
| 09/15/1993 | CN2142211Y Multi-function computer metronome |
| 07/07/1993 | EP0550240A1 Atomic frequency standard |
| 07/01/1993 | CA2086021A1 Miniaturized atomic frequency standard |
| 05/26/1993 | EP0532669A4 An improved frequency standard using an atomic stream of optically cooled atoms |
| 05/25/1993 | US5214228 Electronic metronome |
| 04/29/1993 | WO1993008531A1 Synchronous parallel electronic timing generator |
| 03/24/1993 | EP0532669A1 An improved frequency standard using an atomic stream of optically cooled atoms |
| 03/03/1993 | EP0529875A2 Continuous time interpolator |
| 03/02/1993 | US5191336 System for timing an event signal |
| 02/23/1993 | CA1313763C Time reference device havingan approximately constant stability for short and long term time measurements |
| 12/23/1992 | WO1992022884A1 Device for inputting the musical structure and visualizing the musical time on a score |
| 12/23/1992 | CN2125850U Electronic metronome |
| 12/08/1992 | US5169328 Atomic beam tube assembly |
| 12/01/1992 | US5168478 Time standard assembly with upset protection and recovery means |
| 11/25/1992 | CN2123089U Electronic acoustooptic metronome |
| 11/17/1992 | US5164967 Pedometer for walking, jogging, etc. |
| 10/28/1992 | EP0510840A1 Orthosis with distraction through range of motion |
| 10/13/1992 | US5155695 Time scale computation system including complete and weighted ensemble definition |
| 10/07/1992 | EP0507471A2 Timer circuit including an analog ramp generator and a CMOS counter |
| 09/23/1992 | EP0504625A1 Compensator for a mechanical pendulum clock |
| 09/16/1992 | EP0502967A1 Audible time annunciator |
| 09/15/1992 | US5148437 Laser pumped atomic frequency standard with high frequency stability |
| 08/12/1992 | CN2112875U Electronic metronome |
| 08/04/1992 | US5136261 Saturated absorption double resonance system and apparatus |
| 06/23/1992 | US5124597 Timer circuit including an analog ramp generator and a CMOS counter |
| 06/09/1992 | CA1303153C Piezoelectric resonator |
| 05/20/1992 | CN2105116U Computerized tuning and metre dual-purpose instrument |
| 04/30/1992 | WO1992006752A1 Sports timing aid |
| 04/08/1992 | CN2101271U Electronic metronome |
| 01/21/1992 | US5082281 Sports timing aid |
| 01/02/1992 | DE4020652A1 Time interval signal electronic generator for IC engine - produces output when state of free running counter coincides with content of register loaded by computer |
| 12/18/1991 | EP0461557A2 Time scale computation system including complete and weighted ensemble definition |
| 12/02/1991 | WO1991019413A1 An improved frequency standard using an atomic stream of optically cooled atoms |
| 12/02/1991 | CA2083943A1 Frequency standard using an atomic stream of optically cooled atoms |
| 09/18/1991 | CN1014002B Metronome |
| 09/17/1991 | US5050141 Program to synchronize pace in a multimode alarm timepiece |
| 09/10/1991 | US5047967 Digital front end for time measurement and generation of electrical signals |
| 08/20/1991 | US5040790 Apparatus for pacing |
| 08/06/1991 | US5036742 Tempo monitoring device and associated method |
| 07/02/1991 | US5027686 Tempo setting register |
| 07/02/1991 | CA1285396C Race stopwatch with plural displays and operating modes |
| 06/25/1991 | CA1285146C Metronome |
| 05/30/1991 | WO1991008027A1 Audible time annunciator |
| 05/30/1991 | CA2069940A1 Audible time annunciator |
| 05/16/1991 | WO1991006940A1 Metronomic apparatus and midi sequence controller |
| 04/03/1991 | EP0227712B1 Acoustic signalling device |
| 02/27/1991 | EP0414194A2 Laser pumped atomic frequency standard with high frequency stability |
| 01/23/1991 | EP0409378A2 Digital front end for time measurement and generation of electrical signals |
| 01/08/1991 | US4982642 Data output device |
| 01/01/1991 | US4982387 Digital time base with differential period delay |
| 12/04/1990 | US4974483 Programmable to produce perceivable output signals |
| 11/22/1990 | EP0398038A2 Optical clock system for computers |
| 11/20/1990 | US4972391 Breast feeding timer |
| 11/20/1990 | US4971059 Medical timing device |
| 11/06/1990 | US4969134 Electro-optical signaling system |
| 10/10/1990 | CN2063658U 信号发生器 Signal Generator |
| 10/02/1990 | US4961119 Harmonic optical oscillator |
| 09/25/1990 | US4959540 Optical clock system with optical time delay means |
| 08/28/1990 | US4953148 Elimination of magnetic influence on atomic clocks |
| 08/14/1990 | US4949320 Athletic timer device |
| 08/07/1990 | US4947137 Passive frequency standard |
| 07/24/1990 | US4943955 Atomic clock |
| 06/27/1990 | EP0272275B1 Process for producing a periodic timing signal and pulse generator for performing the process |
| 05/29/1990 | US4928649 Ignition timing control system for an automotive engine |
| 04/24/1990 | US4919030 Visual indicator of temporal accuracy of compared percussive transient signals |
| 02/20/1990 | CA1266099A1 Optical pumping cesium resonator and laser diode detection |
| 02/07/1990 | CN2052547U 定时信号源 Timing source |
| 11/30/1989 | DE3914900A1 Gegen mechanische erschuetterungen unempfindliche atomuhr By mechanical vibration insensitive atomic clock |
| 11/23/1989 | DE3915315A1 Atomic clock which is insensitive to magnetic influences |
| 10/10/1989 | US4873465 2T-cut piezoelectric resonator using coupled contour modes |
| 09/06/1989 | EP0331577A1 Atomic clock |
| 09/06/1989 | EP0330954A1 Passive frequency standard |
| 07/26/1989 | CN2041828U Electronic photoacoustic metronome |
| 07/04/1989 | US4845692 Clocking device of substantially constant stability for short-term and long-term time measurement |
| 06/07/1989 | EP0319475A1 Piezoelectric resonator |
| 05/17/1989 | EP0315877A2 Amplifier |
| 05/10/1989 | EP0315267A2 Metronome device |
| 04/04/1989 | CA1251936A1 Cardiopulmonary resuscitation time piece |
| 02/23/1989 | DE3726927A1 Metronome |
| 01/10/1989 | US4797864 Race stopwatch with plural displays and operating modes |
| 11/29/1988 | US4788096 Devices for making piezoelectric ceramic or ceramic-base composite sensors |
| 11/08/1988 | US4783773 Regatta timing watch |
| 11/02/1988 | EP0289385A1 Reference time device with a constant stability for measuring long and short time intervals |
| 10/18/1988 | US4779248 Electronic timepiece |
| 09/13/1988 | US4771202 Tuning fork resonator |
| 08/02/1988 | US4761771 Electronic timekeeping apparatus with temperature compensation and method for compensating same |
| 07/26/1988 | US4760351 Multiple oscillator device having plural quartz resonators in a common quartz substrate |
| 07/26/1988 | US4759253 Metronome |
| 06/15/1988 | CN86208875U Electronic millisecond watch |
| 04/12/1988 | US4737944 Electronic timepiece |
| 03/29/1988 | US4733593 Mixed meter metronome |
| 03/09/1988 | CN87105704A 节拍器 Metronome |
| 03/08/1988 | US4730286 Circuit and method for correcting the rate of an electronic timepiece |
| 03/02/1988 | EP0257502A2 Metronome |