G04C 3/143
Means to reduce power consumption by reducing pulse width or amplitude and
Official title: {Means to reduce power consumption by reducing pulse width or amplitude and related problems, e.g. detection of unwanted or missing step}
G04C3/143 (Means to reduce power consumption by reducing pulse width or amplitude and) appears on 197 US grants and 119 published applications in this corpus.
Search patents in G04C- Granted patents
- 197
- Published applications
- 119
- Assignees
- 40
- Inventors
- 195
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 11 | 0 |
| 1981 | 8 | 0 |
| 1982 | 14 | 0 |
| 1983 | 7 | 0 |
| 1984 | 15 | 0 |
| 1985 | 9 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 7 | 0 |
| 2001 | 3 | 1 |
| 2002 | 5 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 2 |
| 2007 | 1 | 1 |
| 2008 | 0 | 1 |
| 2009 | 2 | 2 |
| 2010 | 0 | 11 |
| 2011 | 1 | 16 |
| 2012 | 9 | 10 |
| 2013 | 4 | 4 |
| 2014 | 6 | 3 |
| 2015 | 6 | 2 |
| 2016 | 1 | 4 |
| 2017 | 6 | 11 |
| 2018 | 5 | 3 |
| 2019 | 6 | 10 |
| 2020 | 7 | 16 |
| 2021 | 6 | 9 |
| 2022 | 13 | 3 |
| 2023 | 7 | 2 |
| 2024 | 3 | 2 |
| 2025 | 3 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Stepping motor control device, movement, watch, and stepping motor control method24 Feb 2026US 12,562,661 B2Seiko Watch Kabushiki Kaisha
- Electronic watch and electronic watch control method14 Oct 2025US 12,443,147 B2Seiko Epson Corporation
- Pointer device, electronic watch, control method for pointer device, and recording medium7 Jan 2025US 12,189,339 B2Casio Computer Co., Ltd.
- Electronic watch7 Jan 2025US 12,189,343 B2Seiko Epson Corporation
- Movement and electronic watch3 Dec 2024US 12,158,730 B2Seiko Epson Corporation
- Power supply method for a stepper motor and drive device for operating the latter16 Jul 2026US 2026/0205038 A1Carel Industries S.P.A.
- Vibration motor, in particular for a horology movement14 May 2026US 2026/0135455 A1The Swatch Group Research and Development Ltd
- Stepping motor control circuit and analog electronic timepiece17 Apr 2025US 2025/0125750 A1Seiko Watch Kabushiki Kaisha (Trading AS Seiko Watch Corporation)
- Analog electronic timepiece5 Dec 2024US 2024/0402652 A1
- Stepping motor control device, movement, watch, and stepping motor control method19 Sep 2024US 2024/0313677 A1Seiko Watch Kabushiki Kaisha (Trading AS Seiko Watch Corporation)
Most cited
By later US patents
- Step-by-step motor unit95US 4,550,279 AFabriques d'Horlogerie de Fontainemelon S.A. · 1985
- Direct detection of back EMF in permanent magnet step motors77US 4,480,218 AInternational Business Machines Corporation · 1984
- Charging circuit for an analog electronic timepiece71US 4,882,717 ASeiko Epson Corporation · 1989
- Method of and a device for identifying the position of the rotor of a stepping motor50US 4,683,428 AAsulab S. A. · 1987
- System for making-up steps lost by the motor of a time-piece40US 4,300,223 AEbauches Electroniques S. A. · 1981