| Patents for G04D 7 - Measuring, counting, calibrating, testing, or regulating apparatus (391) |
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| 01/28/1987 | CN85205281U Calibration instrument for timepiece with dual trace light-spot |
| 01/20/1987 | US4638247 Integrated circuit for converting a drive signal of three or more voltage levels to two voltage levels |
| 12/09/1986 | US4627268 Method for calibrating instruments for time interval measurements |
| 09/10/1986 | EP0193724A2 Method and apparatus for the calibration of a time-measuring device |
| 07/08/1986 | US4598575 Timer calibration method and apparatus |
| 09/03/1985 | US4538923 Test circuit for watch LSI |
| 12/27/1984 | CA1179850A Interpolating time setting apparatus |
| 10/16/1984 | US4477195 Arrangement of analog-type electronic wristwatch |
| 09/19/1984 | EP0030564B1 Integrated circuit having frequency divider circuit adaptable for high-speed testing |
| 12/20/1983 | US4422038 Integrated circuit with frequency-dividing circuits capable of being tested at a high speed |
| 09/27/1983 | US4407019 Electronic wristwatch |
| 09/13/1983 | US4403869 Electro-optic identifiction code system in a timepiece |
| 08/23/1983 | US4400093 Method for inspecting the running of a timepiece and timepiece adapted for such method |
| 05/17/1983 | US4383432 Clock escapement monitor |
| 05/10/1983 | US4382692 Analog-display electronic timepiece comprising a divider with an adjustable division factor |
| 03/15/1983 | US4376992 Electronic wristwatch with alarm function |
| 02/08/1983 | US4372689 Electronic watch movement |
| 02/01/1983 | US4371794 Monolithic integrated circuit |
| 01/12/1983 | EP0069372A1 Method of controlling the running rate of a timepiece and timepiece adapted to this method |
| 11/09/1982 | CA1135226A1 Apparatus and method for dispensing articles |
| 10/12/1982 | US4354158 Circuit arrangement for generating a sampling pulse train for a periodic signal |
| 08/31/1982 | US4346537 Capacitor trimming system in a quartz-crystal oscillator |
| 07/20/1982 | CA1128214A1 Capacitor trimming system in a quartz-crystal oscillator |
| 07/06/1982 | US4337876 Apparatus for dispensing articles |
| 06/22/1982 | US4335596 Device for measuring the operation of a timepiece movement |
| 04/27/1982 | US4326408 Airtightness testing apparatus for watches |
| 02/09/1982 | US4315329 Load measuring device for the gear train of a timepiece |
| 12/01/1981 | CA1113575A1 Check circuit for synchronized clocks |
| 11/17/1981 | US4301405 Interval-to-rate converter |
| 10/13/1981 | US4295220 Clock check circuits using delayed signals |
| 10/06/1981 | US4292836 Apparatus for measuring the rate of an analog-display electronic timepiece |
| 09/22/1981 | US4291304 Electro-optical display device |
| 09/09/1981 | EP0035468A1 Method and device for controlling the torque of a stepping motor |
| 08/04/1981 | US4282595 Method for digital frequency trimming an oscillator in an electronic timepiece |
| 08/04/1981 | US4282594 Electronic timepiece |
| 07/14/1981 | US4278898 Frequency comparator for electronic clocks |
| 06/24/1981 | EP0030564A1 Integrated circuit having frequency divider circuit adaptable for high-speed testing |
| 05/05/1981 | US4266290 Electronic wristwatch control mechanism |
| 04/14/1981 | US4262347 Electronic timepiece |
| 04/08/1981 | EP0026319A1 Dispensing device for articles |
| 03/10/1981 | US4255804 Electronic watch |
| 02/10/1981 | US4250574 Electronic timepiece in which an input terminal of the integrated circuit is used as an output terminal |
| 02/10/1981 | US4250523 Electronic timepiece |
| 12/24/1980 | WO1980002880A1 Integrated circuit having frequency divider circuit adaptable for high-speed testing |
| 09/30/1980 | US4224820 Frequency deviation meter for timepieces |
| 08/26/1980 | US4219825 Electric actuating device |
| 08/20/1980 | EP0014472A1 Airtightness testing apparatus for watches |
| 07/15/1980 | CA1081789A1 Portable programmer for time-of-day metering register system and method of using same |
| 06/25/1980 | EP0012185A1 Test circuit for synchronously operating clock generators |
| 05/06/1980 | US4201077 Method for measuring the rate or the frequency error of a quartz timepiece and measuring apparatus for carrying out this method |
| 04/02/1980 | EP0009192A1 Circuit for generating a pulse train for a periodic signal |
| 02/05/1980 | US4187518 Timing device |
| 08/28/1979 | US4165605 Electronic timepiece |
| 04/24/1979 | US4150537 Electronic timepiece and method for testing operation of the same |
| 03/06/1979 | US4142360 Electronic timepiece |
| 02/27/1979 | US4142147 Method and system for testing the accuracy of an electronic clock |
| 02/13/1979 | CA1048606A1 Apparatus for automatic adjustment of frequency of mechanical resonators |
| 01/23/1979 | CA1047113A1 Apparatus for automatic adjustment of frequency of mechanical resonators |
| 01/09/1979 | US4133169 Electronic circuit for a quartz crystal watch |
| 12/19/1978 | CA1044761A1 Apparatus for sorting mechanical resonators according to inherent frequency |
| 12/05/1978 | US4128003 Acoustic couplers for horological calibration instruments |
| 10/10/1978 | US4118922 Electronic watch or clock and accessory devices therefor |
| 06/13/1978 | US4094136 Electronic timepiece inspection circuit |
| 06/06/1978 | US4093997 Portable programmer for time-of-day metering register system and method of using same |
| 04/18/1978 | US4084502 Electric acutating device |
| 04/11/1978 | US4083222 Apparatus for measuring the rate of a watch |
| 04/04/1978 | US4081951 Electronic timepiece |
| 03/14/1978 | US4078420 Digital watch analyzer |
| 03/14/1978 | US4078419 Method and apparatus for testing the accuracy of an electronic clock |
| 01/10/1978 | US4068171 Frequency comparator |
| 08/30/1977 | US4044597 Frequency tuning system with visual display |
| 08/16/1977 | US4041767 Testing apparatus for use in calibrating wristwatches |
| 06/21/1977 | US4030338 Timepiece testing apparatus |
| 06/21/1977 | US4030337 Pickup for measuring the rate of an electronic timepiece |
| 06/14/1977 | US4028927 High precision timepiece pace measuring device |
| 05/24/1977 | US4024750 Frequency tuning system with visual display |
| 03/29/1977 | US4014205 Electronic clock regulator |
| 03/22/1977 | US4012941 Method of and apparatus for measuring the amplitude of oscillation of the balance of a timepiece movement |
| 01/04/1977 | US4001553 Counter arrangement and associated test circuit for an electronic timing device |
| 12/21/1976 | US3998044 Electronic timepiece |
| 11/16/1976 | US3991622 Apparatus for measuring airtightness of sealed body |
| 09/07/1976 | US3979681 System and method for decoding reset signals of a timepiece for providing internal control |
| 09/07/1976 | US3978750 Apparatus for adjusting a frequency of an oscillating element provided a hair spring |
| 09/07/1976 | US3978710 Apparatus for determining the degree of gas impermeability for watch cases and the like articles |
| 08/31/1976 | US3978322 Measurement system for timer |
| 05/04/1976 | USRE28794 Balance wheel |
| 04/13/1976 | US3949592 Apparatus for measuring the running of watches |
| 03/30/1976 | US3946592 Digital time error measuring arrangement |
| 03/30/1976 | US3946591 Method of and system for detecting the rate of an electronic timepiece |
| 02/24/1976 | US3939689 Method and apparatus for distinguishing aperiodic noise input signals from periodic input signals during measurement |
| 02/10/1976 | US3937049 Monitoring system for digital electronic timepiece |