G04C 15/00
Clocks driven by synchronous motors
G04C15/00 (Clocks driven by synchronous motors) appears on 19 US grants and 7 published applications in this corpus.
Search patents in G04C- Granted patents
- 19
- Published applications
- 7
- Assignees
- 16
- Inventors
- 26
- Latest grant
- 24 Sep 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 2 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 2 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Method for manufacturing an epilame mechanical part24 Sep 2024US 12,099,330 B2ETA SA Manufacture Horlogere Suisse
- Electronic watch, motor control circuit, and method for controlling electronic watch13 Feb 2024US 11,899,405 B2Seiko Epson Corporation
- Methods and system for determining an error and correcting the angular position of a continuous rotation motor19 Oct 2021US 11,152,877 B2The Swatch Group Research and Development Ltd
- Electronic timepiece and display control method of electronic timepiece16 Oct 2018US 10,101,708 B2Seiko Epson Corporation
- Demand target display device2 May 2017US 9,638,730 B2Nihon Techno Co., Ltd.
- System and method for identifying a timepiece19 Jun 2025US 2025/0200532 A1Ritual Science, LLC
- Method for manufacturing an epilame mechanical part20 Oct 2022US 2022/0334538 A1Eta SA Manufacture HorllgèRe Suisse
- Electronic watch, motor control circuit, and method for controlling electronic watch24 Dec 2020US 2020/0401086 A1Seiko Epson Corporation
- Methods and system for determining an error and correcting the angular position of a continuous rotation motor15 Oct 2020US 2020/0328702 A1The Swatch Group Research and Development Ltd
- Electronic timepiece and display control method of electronic timepiece8 Jun 2017US 2017/0160702 A1Seiko Epson Corporation
Most cited
By later US patents
- Multiphase motor with facially magnetized rotor having N/2 pairs of poles per face59US 4,680,494 A1987
- Multi-pole rotor particularly for small and miniature electric generators and motors21US 4,513,216 AMagnetfabrik Bonn GmbH vorm. Gewerkschaft Windhorst · 1985
- Method and apparatus for controlling the rotational speed and phase of synchronous motors18US 4,418,307 ABraun GmbH · 1983
- Multiphase motor with magnetized rotor having N/2 pairs of poles at its periphery17US 4,629,924 A1986
- Multiphase motor with magnetized rotor having N pairs of poles with axial magnetization13US 4,634,906 A1987