H02P 8/02
Arrangements for controlling dynamo-electric motors rotating step by step: specially adapted for
Official title: specially adapted for single-phase or bi-pole stepper motors, e.g. watch-motors, clock-motors
H02P8/02 (Arrangements for controlling dynamo-electric motors rotating step by step: specially adapted for) appears on 116 US grants and 104 published applications in this corpus.
Search patents in H02P- Granted patents
- 116
- Published applications
- 104
- Assignees
- 46
- Inventors
- 155
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 3 |
| 2005 | 4 | 1 |
| 2006 | 0 | 2 |
| 2007 | 0 | 0 |
| 2008 | 3 | 1 |
| 2009 | 1 | 4 |
| 2010 | 0 | 9 |
| 2011 | 2 | 2 |
| 2012 | 4 | 8 |
| 2013 | 0 | 1 |
| 2014 | 5 | 3 |
| 2015 | 2 | 4 |
| 2016 | 1 | 4 |
| 2017 | 6 | 10 |
| 2018 | 4 | 6 |
| 2019 | 9 | 8 |
| 2020 | 6 | 14 |
| 2021 | 8 | 8 |
| 2022 | 10 | 4 |
| 2023 | 6 | 2 |
| 2024 | 4 | 3 |
| 2025 | 4 | 1 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electromechanical watch capable of contactless communication with a communication device2 Jun 2026US 12,647,054 B2ETA SA Manufacture Horlogere Suisse
- Apparatus for automatically controlling the flow rate of a fluid flowing along a duct and refrigeration or cooling system comprising the aforesaid apparatus10 Feb 2026US 12,546,410 B2Belimo Holding AG
- Electronic watch and electronic watch control method14 Oct 2025US 12,443,147 B2Seiko Epson Corporation
- Control circuit of a stepper motor capable of detecting an external magnetic field16 Sep 2025US 12,418,254 B2ETA SA Manufacture Horlogere Suisse
- Protection circuit for an electric motor with a single-phase winding, an electric centrifugal pump and an oil mist separator with such a protection circuit21 Jan 2025US 12,206,354 B2Bühler Motor GmbH
- Circuit Device And Motor Control System11 Jun 2026US 2026/0163507 A1Seiko Epson Corporation
- Vibration motor, in particular for a horology movement14 May 2026US 2026/0135455 A1The Swatch Group Research and Development Ltd
- Apparatus for automatically controlling the flow rate of a fluid flowing along a duct and refrigeration or cooling system comprising the aforesaid apparatus30 Apr 2026US 2026/0117885 A1Belimo Holding AG
- Stepping motor control circuit and analog electronic timepiece17 Apr 2025US 2025/0125750 A1Seiko Watch Kabushiki Kaisha (Trading AS Seiko Watch Corporation)
- Electromechanical watch capable of contactless communication with a communication device20 Jun 2024US 2024/0204703 A1ETA SA Manufacture Horlogere Suisse
Most cited
By later US patents
- Step-by-step motor unit95US 4,550,279 AFabriques d'Horlogerie de Fontainemelon S.A. · 1985
- Method of controlling a bi-directional stepping motor and a bi-directional stepping motor adapted to be controlled by this method52US 5,028,857 AETA SA Fabriques d'Ebaches · 1991
- Energizing method for a single phase timepiece stepping motor24US 4,542,329 AOmega SA · 1985
- Drive system for pulse motor19US 4,361,410 ACitizen Watch Co., Ltd. · 1982
- Pulse motor17US 4,144,467 ACitizen Watch Co., Ltd. · 1979