A63B 21/157
Ratchet-wheel links
Official title: {Ratchet-wheel links; Overrunning clutches; One-way clutches}
A63B21/157 (Ratchet-wheel links) appears on 446 US grants and 373 published applications in this corpus.
Search patents in A63B- Granted patents
- 446
- Published applications
- 373
- Assignees
- 185
- Inventors
- 682
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 7 | 0 |
| 1988 | 5 | 0 |
| 1989 | 10 | 0 |
| 1990 | 11 | 0 |
| 1991 | 5 | 0 |
| 1992 | 14 | 0 |
| 1993 | 11 | 0 |
| 1994 | 13 | 0 |
| 1995 | 12 | 0 |
| 1996 | 10 | 0 |
| 1997 | 5 | 0 |
| 1998 | 13 | 0 |
| 1999 | 10 | 0 |
| 2000 | 11 | 0 |
| 2001 | 6 | 1 |
| 2002 | 7 | 10 |
| 2003 | 6 | 13 |
| 2004 | 9 | 7 |
| 2005 | 4 | 4 |
| 2006 | 2 | 6 |
| 2007 | 6 | 12 |
| 2008 | 4 | 8 |
| 2009 | 11 | 5 |
| 2010 | 11 | 10 |
| 2011 | 10 | 13 |
| 2012 | 6 | 14 |
| 2013 | 11 | 11 |
| 2014 | 10 | 11 |
| 2015 | 13 | 12 |
| 2016 | 7 | 16 |
| 2017 | 14 | 17 |
| 2018 | 15 | 21 |
| 2019 | 22 | 22 |
| 2020 | 26 | 32 |
| 2021 | 18 | 19 |
| 2022 | 13 | 30 |
| 2023 | 25 | 24 |
| 2024 | 19 | 25 |
| 2025 | 19 | 25 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Eccentrically loaded computerized positive/negative exercise machine317US 4,930,770 A1990
- Rowing machine245US 4,798,378 A1989
- Variable resistance exercise device236US 6,027,429 ANordicTrack, Inc. · 2000
- Stress test exercise device212US 4,720,093 ADel Mar Avionics · 1988
- Dual resistance exercise rowing machine199US 5,072,929 ANordicTrack, Inc. · 1991