| Patents for G04C 3 - Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means (4,122) |
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| 02/24/1981 | US4253173 Dual display synchronization system for a timepiece |
| 02/24/1981 | US4253172 Electronic timepiece or analog type |
| 02/11/1981 | EP0023490A1 Time-keeper in particular quartz controlled clock. |
| 02/10/1981 | US4250576 Electric clock |
| 02/10/1981 | US4250572 Watch module construction |
| 02/05/1981 | WO1981000311A1 Electronic wrist watch and process for casing such watch |
| 02/03/1981 | US4249251 Gear train for timepiece with a stepping motor |
| 01/27/1981 | US4247930 Timepiece with hybrid display |
| 01/20/1981 | US4246498 Semiconductor integrated driving circuit including C-MOS and junction FET's |
| 01/14/1981 | EP0022270A1 Position detector for a stepping motor |
| 01/14/1981 | EP0022255A1 Electronic wristwatch comprising two different displays |
| 01/13/1981 | US4245338 Time correction system for an electronic timepiece |
| 01/07/1981 | EP0021494A1 Electronic clock with time indication by hands and with a rotation detecting member |
| 01/07/1981 | EP0021320A1 Operation detector for a stepping motor |
| 01/06/1981 | US4244044 Waterproof sport watch |
| 01/06/1981 | US4244041 Electronic timepiece with an alarm device |
| 01/06/1981 | US4244039 Electro-mechanical watch |
| 01/06/1981 | US4243329 Watch movement construction |
| 12/30/1980 | US4242745 Electronic timepiece with electroacoustic transducer |
| 12/30/1980 | US4242623 Miniature electric stepping motor |
| 12/23/1980 | US4241439 Substrate board/carrier frame assembly |
| 12/23/1980 | US4241436 Method of manufacturing of electronic modules for timepieces and electronic module obtained by carrying out this method |
| 12/23/1980 | US4241434 Stepping motor mechanism for an electronic watch |
| 12/23/1980 | US4241433 Electronic watch |
| 11/25/1980 | US4236241 Electronic timepiece |
| 11/25/1980 | US4236240 Watch module construction |
| 11/25/1980 | US4236239 Electronic timepiece comprising two different displays |
| 11/25/1980 | US4235072 Motor drive circuit in digital type electronic time piece |
| 11/18/1980 | US4234946 Electronic wristwatches |
| 11/11/1980 | US4233680 Electric clock |
| 11/11/1980 | US4232510 Timepiece |
| 11/11/1980 | CA1089242A1 Electromechanical pulse-generator |
| 11/04/1980 | US4232384 Timesetting arrangement for electrical timepieces |
| 10/21/1980 | US4228648 Hour hand corrector for dual display timepiece |
| 10/21/1980 | US4228646 Electronic timepiece with indication disk for internal state of timepiece |
| 10/16/1980 | WO1980002203A1 Stepping polyphased motor for a clockwork mechanism |
| 10/14/1980 | US4228533 Autonomous pendulum mechanism for clockworks |
| 10/07/1980 | US4227135 Step motor driving circuit |
| 09/23/1980 | US4223523 Electronic analog alarm timepiece |
| 09/23/1980 | US4223522 Electronic timepiece |
| 09/23/1980 | US4223521 Wristwatch movement |
| 09/09/1980 | US4222010 Control device for rapidly setting an electronic digital display |
| 09/02/1980 | US4219999 Electronic timepiece equipped with battery life display |
| 08/26/1980 | US4218872 Display device for timepiece |
| 08/19/1980 | US4217752 Fixing structure of back cover for watch |
| 08/19/1980 | US4217751 Electronic timepiece |
| 08/12/1980 | US4216648 System for detecting the end useful life of a battery in an electronic time-piece |
| 08/12/1980 | US4216646 Electronic watch |
| 08/05/1980 | US4215531 Watches |
| 07/29/1980 | US4214434 Electronic watches |
| 07/15/1980 | US4212158 Electronic timepiece |
| 07/15/1980 | US4212156 Step motor control mechanism for electronic timepiece |
| 07/08/1980 | US4211066 Stop watch |
| 07/01/1980 | US4209976 Means of setting a solid state watch |
| 07/01/1980 | US4209971 Electronic timepiece |
| 07/01/1980 | US4209970 Electronic timepiece |
| 06/25/1980 | EP0012460A1 Unitary stator for a stepping motor for watches |
| 06/24/1980 | US4208868 Control device for a step-by-step motor |
| 06/17/1980 | US4207732 Hand-indication type electronic timepiece |
| 06/10/1980 | US4206590 Electronic wristwatch case |
| 06/03/1980 | US4205523 Case body construction for timepieces |
| 06/03/1980 | US4205519 Electronic time-piece with acoustic signal, for signalling a particular working mode |
| 05/29/1980 | WO1980001113A1 Time-keeper in particular quartz controlled clock |
| 05/28/1980 | EP0011284A2 A watch for displaying multiple world times |
| 05/27/1980 | US4205262 Electronic watch |
| 05/27/1980 | US4204397 Electronic timepiece |
| 05/27/1980 | US4204396 Watch |
| 05/27/1980 | CA1078479A1 Isolated paths connector and isolated path coupling system |
| 05/06/1980 | US4201043 Wristwatch calculator imput key positioning assembly |
| 05/06/1980 | US4201040 Watch movement construction |
| 04/29/1980 | US4199932 Electronic timepiece with mixed time setting |
| 04/29/1980 | US4199931 Connection terminal construction for driving coils of electronic timepieces |
| 04/22/1980 | US4199699 Motor and drive for a timepiece |
| 04/22/1980 | US4198809 Construction of an analogue crystal wrist watch |
| 04/22/1980 | US4198808 Calendar timepiece |
| 04/08/1980 | US4196584 Time correcting device for electronic timepiece |
| 04/08/1980 | US4196579 Mechanically operating pendulum clock with an electronic correcting device |
| 04/08/1980 | US4196578 Electro-mechanical watch |
| 03/25/1980 | US4194355 Connection structure for watch case and band |
| 03/25/1980 | US4194351 Electronic timepiece |
| 03/18/1980 | CA1073684A1 Dual function pusher and rotate switch for solid state digital watches |
| 03/11/1980 | US4192197 Disengageable transmission device |
| 03/11/1980 | US4192132 Quartz controlled analog watch |
| 03/11/1980 | US4192131 Step motor control mechanism for electronic timepiece |
| 03/06/1980 | WO1980000380A1 Reductor for electromechanical wrist watches with stepping motor and central seconds hand |
| 03/04/1980 | CA1073020A1 Switch mechanism for an electronic timepiece |
| 03/04/1980 | CA1072750A1 Electronic timepiece with single push button cam operated switching |
| 02/19/1980 | US4188777 Electro-mechanical calendar watch |
| 02/19/1980 | US4188774 Electro-mechanical calendar timepiece |
| 02/19/1980 | CA1071879A1 Rocking motor for low cost quartz |
| 02/05/1980 | US4186551 Electronic timepiece structure |
| 02/05/1980 | CA1070957A1 Casing ring adapters for fitting small watch movements to larger size watch cases |
| 01/29/1980 | US4186322 Electric rotary stepping motor |
| 01/22/1980 | US4185214 Miniature synchronous motor with vibration damper |
| 01/22/1980 | CA1070252A1 Gravity rollerway conveyor |
| 01/08/1980 | US4182114 Time-piece with electric motor driven display and planetary motion work |
| 01/08/1980 | US4182111 Electronic timepiece |
| 01/08/1980 | CA1069572A1 Stepping motor with stator pole extensions to provide magnetic detent |
| 01/01/1980 | CA1068912A Structure and method of making a low-cost shock-resistant watch |
| 12/11/1979 | US4177631 Small-sized quartz crystal wristwatch |