| Patents for G04C 13 - Driving mechanisms for clocks by master clocks (402) |
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| 07/08/1993 | WO1993013464A1 Autonomous radio clock |
| 06/23/1993 | EP0547534A1 Electromagnetic transducer with a multipolar permanent magnet |
| 11/04/1992 | CN1065955A Electromagnetic motor with two rotation senses particularly intended for timepiece |
| 10/21/1992 | EP0509351A1 Electromagnetic motor having two rotation directions, in particular for timepiece |
| 09/30/1992 | EP0505595A1 Stepping motor for timepieces |
| 07/21/1992 | US5132578 Stepping motor for timepiece |
| 05/14/1992 | DE4105506C1 Time registering installation with concentrator for data input terminals - has radio clock receiver with interface allowing information concerning actual time to be called up |
| 05/12/1992 | US5113100 Energization coil device, a method of making such a device and an electromagnetic micromotor fitted therewith |
| 04/28/1992 | CA1299378C Quartz analog watch movement with lavet-stepping motor and large energy cell |
| 03/28/1992 | WO1992006418A1 Impulse clock system |
| 01/22/1992 | EP0467228A1 Autonomous radio updated clock |
| 11/13/1991 | CN1014747B Rotor, specially adapted for clocks stepping motor or watches stepping motor |
| 10/22/1991 | US5059840 Stator assembly for a timepiece stepping motor |
| 10/01/1991 | US5054009 Motor, in particular, for driving a clockwork |
| 09/26/1991 | DE4114291A1 Electronic tower clock regulated by radio - has 2 metre dia. dial with 6 volt DC motor for minute hand drive |
| 09/24/1991 | US5051633 Multipolar stepping motor |
| 09/18/1991 | CN1054688A Energization coil device, method of making such device and electromagnetic micromotor fitted therewith |
| 09/04/1991 | EP0444539A1 Exciting coil set, method of fabricating the same and micromotor equipped therewith |
| 08/13/1991 | US5039895 Motor arrangement having a coil |
| 05/02/1991 | EP0424772A2 Remotely synchronizable time display |
| 04/27/1991 | CA2028535A1 Remote synchronizable time indicator |
| 04/25/1991 | DE4033584A1 Automatic appts. for slaving clocks to central time - receives digital time signal, compares to time incremented by drive pulse from zero electro-mechanically driver |
| 03/05/1991 | CA1280898C Stepping motor and frame plate assembly for a wristwatch |
| 01/08/1991 | US4984223 Analog style electronic watch |
| 11/22/1990 | CA2016332A1 Method for making a timepiece stepping motor |
| 09/18/1990 | CA1274268A1 Bipolar stepping motor rotor and method of manufacture |
| 04/03/1990 | US4912832 Method for making a timepiece stepping motor |
| 03/13/1990 | US4908808 Timepiece having a multipolar rotor |
| 03/01/1990 | DE3828810A1 Device for detecting the position of a display of an analog electronic clock (timepiece), in particular a radio-controlled clock |
| 02/28/1990 | EP0356396A1 Multipolar step motor |
| 02/28/1990 | EP0355263A2 Motor, in particular for driving a time piece |
| 01/04/1990 | DE3822412A1 Method for automatically setting autonomous radio clocks |
| 12/14/1989 | DE3918637A1 Electronic analog slave clock (secondary dial) with hand lengths of up to 600 mm |
| 09/13/1989 | CN2044357U Large clock with outside core |
| 06/28/1989 | CN2040263U Synchronous analog ac tower clock controlled by quartz clock |
| 06/01/1989 | WO1989005001A1 Time-piece |
| 05/24/1989 | EP0316501A1 Time piece |
| 05/10/1989 | CN2037484U Tower clock controller |
| 04/26/1989 | EP0312946A1 Electronic timepiece |
| 01/18/1989 | CN1030485A Quartz analog watch movement with lavet-stepping motor and large energy cell |
| 01/11/1989 | EP0298189A2 Quartz analog watch movement with lavet-stepping motor and large energy cell |
| 12/28/1988 | EP0296691A1 Electro-mechanical timepiece with stepper motor |
| 10/26/1988 | EP0287945A1 Motor device comprising at least one coil, and process for manufacturing this coil |
| 10/12/1988 | EP0285838A1 Autonomous radio-controlled clock |
| 10/05/1988 | CN87102251A Stepping motor and frame plate assembly for wristwatch |
| 07/13/1988 | CN87105648A Bipolar stepping motor rotor with drive pinion and method of manufacture |
| 06/29/1988 | EP0187740B1 Single-phase motor with magnetized rotor |
| 06/23/1988 | DE3642249A1 Pulse amplifier for the time service technology |
| 05/10/1988 | US4744066 Quartz analog movement with lavet stepping motor and large energy cell |
| 03/02/1988 | EP0257196A2 Bipolar stepping motor rotor with drive pinion and method of manufacture |
| 02/16/1988 | US4725749 Stepping motor and frame plate assembly for a wristwatch movement |
| 01/13/1988 | CN86108651A Stator for watch-stepping motor |
| 01/06/1988 | CN86108650A Rotor, specially adapted for clocks stepping motor or watches stepping motor |
| 12/15/1987 | US4713565 Single-phase motor with a magnetized rotor |
| 12/08/1987 | US4711584 Movement of electronic watch of analog display type |
| 11/19/1987 | EP0151158B1 Multiphase motor with magnetized rotor having n pairs of poles with axial magnetization |
| 10/29/1987 | DE3612724A1 Magnetic rotor for a crystal clock mechanism, and an injection-moulding die for its production |
| 10/27/1987 | US4703208 Wristwatch stepping motor |
| 10/13/1987 | US4700091 Bipolar stepping motor rotor with drive pinion and method of manufacture |
| 09/30/1987 | EP0238934A2 Stepping motor and frame plate assembly for a wristwatch movement |
| 07/14/1987 | US4680514 Motor |
| 07/14/1987 | US4680494 Multiphase motor with facially magnetized rotor having N/2 pairs of poles per face |
| 05/12/1987 | US4665335 Small-sized synchronous motor with specific stator coil length to stator coil radius ratios |
| 05/12/1987 | US4665330 Step motor particularly for electronic timepieces |
| 02/24/1987 | US4645357 Electroptical detector for determining the position of the time display mechanism of a timepiece |
| 02/24/1987 | US4645356 Wristwatch |
| 01/06/1987 | US4634906 Multiphase motor with magnetized rotor having N pairs of poles with axial magnetization |
| 12/16/1986 | US4629924 Multiphase motor with magnetized rotor having N/2 pairs of poles at its periphery |
| 07/23/1986 | EP0187740A1 Single-phase motor with magnetized rotor. |
| 07/22/1986 | US4602165 Switch assembly for maintaining an electric time switch clock synchronized with real time |
| 06/25/1986 | EP0185160A2 Radio-controlled time piece |
| 05/14/1986 | EP0180880A2 Display detection device for a watch, in particular a radio watch |
| 02/19/1986 | EP0172069A1 Data transmission installation, in particular for time distribution, transmitter and receiver for this installation |
| 02/18/1986 | US4571516 Electromagnetic motor |
| 01/30/1986 | WO1986000765A1 Single-phase motor with magnetized rotor |
| 01/21/1986 | US4565454 Time display system |
| 01/07/1986 | US4563604 Electromagnetic stepping motor with two coupled rotors |
| 12/04/1985 | EP0162966A2 Electric stepper motor |
| 11/27/1985 | EP0162150A2 Motor |
| 10/08/1985 | US4546278 Winding for subjecting the rotor of a stepping motor to two magnetic fields symmetric to two perpendicular axes by energization of one winding |
| 09/11/1985 | EP0153930A1 Multiphase motor with magnetized rotor having n/2 pairs of poles at its periphery |
| 08/14/1985 | EP0151159A1 Multiphase motor with magnetized motor having n/2 pairs of poles per face |
| 08/14/1985 | EP0151158A1 Multiphase motor with magnetized rotor having n pairs of poles with axial magnetization. |
| 07/31/1985 | EP0149647A1 Monophase motor with magnetized rotor having n/2 pairs of poles per face |
| 06/26/1985 | EP0141810A4 A time display system. |
| 06/11/1985 | US4522506 Time signal clock |
| 06/05/1985 | EP0143227A1 Electro-magnetic stepping motor with two coupled rotors |
| 05/28/1985 | US4520072 Dissolving a coloring substance in solvent and absorption on carrier |
| 05/22/1985 | EP0141810A1 A time display system |
| 05/21/1985 | US4518884 Step motor particularly for electronic timepieces |
| 04/30/1985 | US4514676 Method and device for controlling a bidirectional stepping motor |
| 02/14/1985 | WO1985000707A1 Monophase motor with magnetized rotor having n/2 pairs of poles per face |
| 02/14/1985 | WO1985000706A1 Multiphase motor with magnetized rotor having n/2 pairs of poles at its periphery |
| 02/14/1985 | WO1985000705A1 Multiphase motor with magnetized motor having n/2 pairs of poles per face |
| 02/14/1985 | WO1985000704A1 Multiphase motor with magnetized rotor having n pairs of poles with axial magnetization |
| 02/13/1985 | EP0132633A1 Electromagnetic stepping motor |
| 12/05/1984 | EP0127112A1 Motor unit functioning step by step |
| 11/20/1984 | US4483627 Electronic timepiece |
| 09/25/1984 | US4473766 Clockwork stepping motor stator and process for making same |
| 07/17/1984 | US4460859 Stepping motor assembly |