| Patents for G04G 19 - Electric power supply circuits specially adapted for use in electronic time-pieces (1,255) |
|---|
| 02/20/1979 | US4141064 Booster circuit |
| 01/09/1979 | US4134057 Device for enabling an accumulator to be recharged from a source of electrical energy |
| 12/26/1978 | US4131864 Low voltage compensator for power supply in a complementary MOS transistor crystal oscillator circuit |
| 12/26/1978 | US4130988 Electronic circuit for electronic watch |
| 12/12/1978 | US4129792 Driver buffer circuit using delay inverters |
| 12/05/1978 | US4128816 Electronic circuit |
| 10/10/1978 | US4120039 Electronic digital watch combined with a computer |
| 10/10/1978 | US4118922 Electronic watch or clock and accessory devices therefor |
| 09/12/1978 | US4112764 Automatic on/off digitally timed electronic switch |
| 09/12/1978 | US4112670 Electronic timepiece |
| 08/29/1978 | US4110637 Electronic system for capacitively storing a signal voltage of predetermined level |
| 08/15/1978 | US4106279 Wrist watch incorporating a thermoelectric generator |
| 08/01/1978 | US4103482 Wristwatch having a liquid crystal display |
| 07/11/1978 | US4099372 Timekeeping apparatus with power line dropout provisions |
| 06/13/1978 | US4094140 Timepiece-gas lighter assembly |
| 06/13/1978 | US4094137 Voltage conversion system for electronic timepiece |
| 05/23/1978 | US4090350 Electronic timepiece |
| 05/09/1978 | US4087960 Solar battery wristwatch |
| 03/28/1978 | US4080780 Electronic time keeping system |
| 02/21/1978 | US4074515 Electronic timepiece with battery life display |
| 01/17/1978 | US4068465 Clock using alternating current cycle counting |
| 01/10/1978 | US4068295 Voltage multiplier for an electronic time apparatus |
| 01/03/1978 | US4065916 Electronic timepiece |
| 12/06/1977 | US4061929 Circuit for obtaining DC voltage higher than power source voltage |
| 12/06/1977 | US4060974 Method and apparatus for driving electrochromic display device |
| 10/18/1977 | US4054826 Method and apparatus for charging batteries using variable capacitors |
| 10/11/1977 | US4053821 Voltage multiplier circuit |
| 08/23/1977 | US4043113 Electric watch battery retainer |
| 08/23/1977 | US4043112 Electronic timepiece having a battery voltage monitor |
| 08/09/1977 | US4040247 Clock drive apparatus |
| 06/14/1977 | US4029973 Voltage booster circuit using level shifter composed of two complementary MIS circuits |
| 05/31/1977 | US4026102 Electronic clock |
| 04/05/1977 | US4016476 Booster circuits |
| 04/05/1977 | US4015420 Battery select circuitry and level translator for a digital watch |
| 03/29/1977 | US4014165 DC-DC converter in watch system |
| 03/15/1977 | US4011713 Battery powered electronic timepiece with voltage regulation |
| 02/15/1977 | US4008429 Voltage translator for solid state watch |
| 01/18/1977 | US4003198 Electronic timepiece |
| 01/04/1977 | US4001808 Electronic device for monitoring power consumption of an electro-optical display |
| 01/04/1977 | US4001664 D.c. potential multiplier |
| 12/28/1976 | US3999368 Circuit for an electronic timepiece |
| 11/30/1976 | US3995177 Electronic watch |
| 09/14/1976 | US3979899 Digital display type electronic time keeper |
| 09/07/1976 | US3979656 Battery charging circuit |
| 08/17/1976 | US3975671 Capacitive voltage converter employing CMOS switches |
| 08/17/1976 | US3974636 Booster circuit for a liquid crystal display device of a timepiece |
| 07/13/1976 | US3969719 Electronic watch |
| 07/13/1976 | US3968641 Digital watch with oscillator/divider power selection circuitry |
| 06/29/1976 | US3965665 Electronic watch construction |
| 05/11/1976 | US3955353 Direct current power converters employing digital techniques used in electronic timekeeping apparatus |
| 04/13/1976 | US3949546 Illuminating device for digital display wristwatches |
| 03/30/1976 | US3946550 Quartz crystal timepiece |
| 03/16/1976 | US3943694 Divers' fluid-tight watch comprising an electric circuit |
| 03/02/1976 | US3942043 Electronic watch |
| 01/27/1976 | US3934399 Electric timepiece incorporating rectifier and driving circuits integrated in a single chip |