A63B 21/0056
Using electromagnetically-controlled friction
Official title: {using electromagnetically-controlled friction, e.g. magnetic particle brakes}
A63B21/0056 (Using electromagnetically-controlled friction) appears on 172 US grants and 156 published applications in this corpus.
Search patents in A63B- Granted patents
- 172
- Published applications
- 156
- Assignees
- 104
- Inventors
- 348
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 8 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 0 |
| 2002 | 2 | 0 |
| 2003 | 1 | 2 |
| 2004 | 2 | 0 |
| 2005 | 1 | 2 |
| 2006 | 0 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 1 | 1 |
| 2010 | 1 | 3 |
| 2011 | 1 | 4 |
| 2012 | 1 | 5 |
| 2013 | 1 | 5 |
| 2014 | 3 | 9 |
| 2015 | 7 | 4 |
| 2016 | 5 | 8 |
| 2017 | 5 | 5 |
| 2018 | 5 | 13 |
| 2019 | 11 | 7 |
| 2020 | 8 | 15 |
| 2021 | 8 | 21 |
| 2022 | 14 | 12 |
| 2023 | 7 | 10 |
| 2024 | 14 | 11 |
| 2025 | 6 | 12 |
| 2026 | 7 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Training device and training system21 Jul 2026US 12,685,901 B2Kabushiki Kaisha Atsumitec
- Resistance unit and exercise machine having the same14 Jul 2026US 12,678,649 B2
- Exercise bike9 Jun 2026US 12,649,087 B2LG Electronics Inc.
- Exercise machine with resistance selector system24 Mar 2026US 12,582,860 B2Lagree Technologies, Inc.
- Stair step exercise machine8 Oct 2026US 2026/0306903 A1Stronger Brands Consulting, LLC
- Embedded Flywheel Power Generation and Resistance Control System and Integrated Fitness Equipment Power Generation and Resistance System2 Apr 2026US 2026/0091255 A1Bion Inc.
- Tread-Based Machine with Configurable Support Surface25 Dec 2025US 2025/0387664 A1Multi Modal Fitness, Inc.
- Resistance unit and exercise machine having the same23 Oct 2025US 2025/0325861 A1
- Sports Apparatus and Braked Device Thereof, Brake Driver and Integrated External Magnetic Control Module16 Oct 2025US 2025/0319350 A1Ningbo Zhuanhe Technology Co., Ltd.
Most cited
By later US patents
- Interactive exercise apparatus400US 5,785,630 ATectrix Fitness Equipment, Inc. · 1998
- Interactive exercise apparatus313US 5,890,995 ATectrix Fitness Equipment, Inc. · 1999
- Computer controlled exercise machine254US 4,869,497 AUniversal Gym Equipment, Inc. · 1989
- Communication system for an instrumented orthopedic restraining device and method therefor251US 5,929,782 A1999
- Variable resistance exercise device236US 6,027,429 ANordicTrack, Inc. · 2000