| Patents for G04F 1 - Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timer (1,165) |
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| 09/23/1992 | WO1992016916A1 Elapsed time indicator |
| 09/23/1992 | CA2106560A1 Elapsed time indicator |
| 08/05/1992 | WO1992013724A1 Security identification badge |
| 07/08/1992 | EP0493436A1 An automatic parking coupon. |
| 07/07/1992 | US5128568 Self-biasing timing circuit for achieving long time delays |
| 07/01/1992 | EP0492027A1 Time display device |
| 06/16/1992 | US5122994 Clock apparatus |
| 06/02/1992 | US5119347 Method and timing device for measuring time intervals |
| 06/02/1992 | US5119346 Child alarm system |
| 05/26/1992 | US5117405 Quick reset game timer |
| 05/22/1992 | WO1992009870A1 Color changing device for monitoring shelf-life of perishable products |
| 05/22/1992 | CA2096742A1 Color changing device for monitoring shelf-life of perishable products |
| 04/28/1992 | CA1299377C Regatta timing watch |
| 04/22/1992 | EP0481967A2 Temperature compensation circuit and time delay generatof including the same |
| 04/21/1992 | US5107470 Transparent impervious substrate, opaque coating, and release agent |
| 04/08/1992 | EP0479699A2 Self-biasing timing circuit |
| 04/01/1992 | EP0477199A1 Dental hygiene instruction display. |
| 03/03/1992 | US5093815 Hourglass novelty apparatus having unequal chamber volumes |
| 12/27/1991 | EP0462134A1 Indicator, process for obtaining it and its use |
| 12/19/1991 | DE4108481A1 Sand chess clock - has two hour glasses mounted mutually perpendicularly in holder |
| 11/26/1991 | US5068839 Resettable sandglass-type timing device which provides selective timing periods |
| 11/05/1991 | US5063355 Timer circuit |
| 10/16/1991 | EP0451888A2 Improved time color indicator |
| 10/15/1991 | US5058088 Time indicator |
| 08/28/1991 | CA2037218A1 Teeth health care |
| 08/10/1991 | WO1991012569A1 Drinking water filter |
| 08/10/1991 | CA2075480A1 Drinking water filter |
| 07/25/1991 | WO1991006838A3 Electrical expiry indicator |
| 07/16/1991 | US5031537 Electrical timing arrangements and methods |
| 07/09/1991 | US5031161 Life expectancy timepiece |
| 06/11/1991 | US5023852 Resettable gravity timer |
| 05/16/1991 | WO1991006838A2 Electrical expiry indicator |
| 05/08/1991 | EP0425749A1 Timing relay |
| 05/08/1991 | DE3936543A1 Elektrischer verfallsindikator Electrical decaying indicator |
| 05/03/1991 | WO1991006853A1 Indicator for displaying time-lapses and/or the onset of changes of state |
| 05/03/1991 | CA2072643A1 Indicator for display of elapsed times and/or of the moment when changes of state occur |
| 05/02/1991 | WO1991006046A1 Method and apparatus for timing the delivery of a speech |
| 05/01/1991 | CN1051096A An automatic parking coupon |
| 04/23/1991 | US5010331 Time-key integrated circuit |
| 04/09/1991 | US5007034 Operation indicator of timepiece and so on |
| 04/02/1991 | US5005160 Game timing apparatus |
| 04/02/1991 | CA1282285C Time duration indicator systems, and also products containing such indicator systems having a limited duration of use or life |
| 03/21/1991 | WO1991004520A1 An automatic parking coupon |
| 03/21/1991 | CA2066603A1 Automatic parking coupon |
| 03/05/1991 | US4998228 Drinking water filter |
| 02/19/1991 | US4995018 Method and apparatus for timing the delivery of a speech |
| 02/12/1991 | US4991755 Toothpaste dispenser with timer assembly |
| 01/24/1991 | DE3923510A1 Electronic device monitoring residual storage time of frozen food - displays identification number for data associated with stored items marked with same number and indicates when time has elapsed |
| 01/24/1991 | DE3923509A1 Monitoring residual storage times of frozen food - using electronic device indicating time and identity of item with shortest residual time |
| 01/22/1991 | US4986183 Method and apparatus for calibration of electronic delay detonation circuits |
| 01/17/1991 | DE3920036A1 time indicator with electronic clockwork - has control unit sequentially activating display units arranged in row to show elapsed time e.g. time spent in sauna |
| 01/16/1991 | CA2021143A1 Electronic device for monitoring the remaining storage life of frozen foods |
| 11/29/1990 | WO1990014651A1 Dental hygiene instruction display |
| 11/28/1990 | EP0368877A4 Timing device |
| 11/20/1990 | US4972391 Breast feeding timer |
| 10/24/1990 | CN1010146B Improvement scheme of time delay circuit |
| 09/25/1990 | US4959819 Regenerating power unit |
| 09/20/1990 | DE3907683A1 Indikator, verfahren zu seiner herstellung sowie seine verwendung Indicator, process for its preparation and its use |
| 09/19/1990 | EP0388116A1 Timer circuit |
| 09/10/1990 | WO1990010868A1 Indicator, process for obtaining it and its use |
| 09/10/1990 | CA2050280A1 Indicator, process for obtaining it and its use |
| 06/19/1990 | US4934940 Dental hygiene instruction display |
| 05/29/1990 | US4929090 Temperature history indicatiang label |
| 05/29/1990 | US4928700 Pulse wave detecting apparatus |
| 05/23/1990 | EP0369665A2 Electrical timing arrangements and methods |
| 05/23/1990 | EP0368877A1 Timing device |
| 05/22/1990 | US4928270 Digital timer with constant resolution |
| 05/03/1990 | WO1990004765A1 Temperature history indicating label |
| 05/01/1990 | US4921636 Time duration indicator systems, and also products containing such indicator systems having a limited duration of use or life |
| 04/10/1990 | US4914819 Eating utensil for indicating when food may be eaten therewith and a method for using the utensil |
| 03/13/1990 | US4908807 Mechanical interval timer with calibration means |
| 02/20/1990 | US4903254 Time indicator enhancement method |
| 02/06/1990 | US4899152 Method and apparatus for temperature compensating a digital to analog converter |
| 01/30/1990 | US4897860 Programmable time base circuit with protected internal calibration |
| 01/03/1990 | EP0349392A1 Numerical timer with constant resolution |
| 12/28/1989 | DE3820915A1 Chess clock with a digital display |
| 12/05/1989 | US4885585 Ramp generator reset circuit |
| 11/29/1989 | EP0343177A1 Digital-to-time converter. |
| 11/28/1989 | US4884255 Digital chess clock |
| 11/28/1989 | US4884253 Bread making device with a clock function |
| 11/16/1989 | WO1989011118A1 Timer |
| 11/09/1989 | DE3813748A1 Inverted hour-glass |
| 11/07/1989 | US4879505 Temperature and power supply compensation circuit for integrated circuits |
| 09/12/1989 | US4866684 Chronometer for starting races, particularly regattas |
| 08/02/1989 | EP0326385A1 Pulse wave detecting apparatus |
| 08/01/1989 | USRE33004 Apparatus and method for selectively activating plural electrical loads at predetermined relative times |
| 07/18/1989 | US4849951 Mechanical interval timer with calibration means |
| 07/11/1989 | US4847776 Microprocessor parking meter internally held in a car |
| 07/11/1989 | US4846467 Race driver start signal reaction timer |
| 06/21/1989 | EP0321413A1 Pulse meter watch |
| 06/14/1989 | CN1033431A Improvement scheme of time delay circuit |
| 06/06/1989 | US4836415 Dental timer |
| 03/14/1989 | USRE32888 Apparatus and method for selectively activating plural electrical loads at predetermined relative times |
| 03/14/1989 | US4813030 Resettable multiple timer |
| 01/26/1989 | WO1989000721A1 Timing device |
| 01/12/1989 | WO1989000302A1 Sand-glass, in particular for indicating the duration of brushing of the teeth |
| 12/21/1988 | EP0295255A1 Cooking indicator |
| 11/17/1988 | WO1988004865A3 Digital-to-time converter |
| 11/08/1988 | US4783773 Regatta timing watch |
| 10/11/1988 | US4777384 Source voltage triggered timer |