H02P 8/40
Special adaptations for controlling two or more stepping motors
H02P8/40 (Special adaptations for controlling two or more stepping motors) appears on 83 US grants and 53 published applications in this corpus.
Search patents in H02P- Granted patents
- 83
- Published applications
- 53
- Assignees
- 72
- Inventors
- 147
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 5 |
| 2003 | 2 | 2 |
| 2004 | 2 | 2 |
| 2005 | 3 | 1 |
| 2006 | 1 | 1 |
| 2007 | 1 | 2 |
| 2008 | 2 | 2 |
| 2009 | 1 | 3 |
| 2010 | 2 | 3 |
| 2011 | 2 | 1 |
| 2012 | 1 | 3 |
| 2013 | 2 | 2 |
| 2014 | 3 | 4 |
| 2015 | 3 | 0 |
| 2016 | 2 | 1 |
| 2017 | 0 | 2 |
| 2018 | 2 | 3 |
| 2019 | 3 | 2 |
| 2020 | 3 | 3 |
| 2021 | 1 | 2 |
| 2022 | 4 | 4 |
| 2023 | 3 | 2 |
| 2024 | 1 | 2 |
| 2025 | 3 | 0 |
| 2026 | 1 | 0 |
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
- Step-based systems with multiple actuators11 Nov 2025US 12,468,280 B2Marel Limited
- Image forming apparatus15 Jul 2025US 12,362,689 B2Canon Kabushiki Kaisha
- Half-step motor driver1 Apr 2025US 12,267,037 B2Siemens Schweiz AG
- Lens control device and lens control method20 Feb 2024US 11,906,894 B2Olympus Corporation
- Stepping motor control device, movement, watch, and stepping motor control method19 Sep 2024US 2024/0313677 A1Seiko Watch Kabushiki Kaisha (Trading AS Seiko Watch Corporation)
- Image forming apparatus7 Mar 2024US 2024/0079976 A1Canon Kabushiki Kaisha
- Step-based systems with multiple actuators14 Sep 2023US 2023/0288901 A1Marel Limited
- Half-Step Motor Driver22 Jun 2023US 2023/0198432 A1Siemens Schweiz AG
- Absolute position sensing system for stepper motor mechanism14 Jul 2022US 2022/0221139 A1Robe Lighting s.r.o.
Most cited
By later US patents
- Systems and methods of electric motor control930US 6,586,898 B2Magnon Engineering, Inc. · 2003
- Automotive suspension control system utilizing variable damping force shock absorber61US 5,360,089 AUnisia Jecs Corporation · 1994
- Stepper motor control54US 4,468,601 AThe Perkin-Elmer Corporation · 1984
- Drive apparatus having at least two electric motors44US 4,289,997 AKeiper Automobiltechnik GmbH & Co. KG · 1981
- Electromechanical actuator control system33US 4,825,133 AOki Electric Industry Co., Ltd. · 1989