A63B 21/023
Wound springs
Official title: {Wound springs}
A63B21/023 (Wound springs) appears on 1,655 US grants and 1,493 published applications in this corpus.
Search patents in A63B- Granted patents
- 1,655
- Published applications
- 1,493
- Assignees
- 447
- Inventors
- 2,104
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 7 | 0 |
| 1978 | 8 | 0 |
| 1979 | 5 | 0 |
| 1980 | 9 | 0 |
| 1981 | 6 | 0 |
| 1982 | 16 | 0 |
| 1983 | 8 | 0 |
| 1984 | 17 | 0 |
| 1985 | 7 | 0 |
| 1986 | 14 | 0 |
| 1987 | 17 | 0 |
| 1988 | 12 | 0 |
| 1989 | 20 | 0 |
| 1990 | 17 | 0 |
| 1991 | 15 | 0 |
| 1992 | 14 | 0 |
| 1993 | 17 | 0 |
| 1994 | 22 | 0 |
| 1995 | 17 | 0 |
| 1996 | 26 | 0 |
| 1997 | 18 | 0 |
| 1998 | 30 | 0 |
| 1999 | 19 | 0 |
| 2000 | 27 | 0 |
| 2001 | 23 | 5 |
| 2002 | 24 | 28 |
| 2003 | 40 | 37 |
| 2004 | 21 | 34 |
| 2005 | 17 | 35 |
| 2006 | 21 | 41 |
| 2007 | 25 | 30 |
| 2008 | 18 | 36 |
| 2009 | 22 | 49 |
| 2010 | 47 | 49 |
| 2011 | 39 | 46 |
| 2012 | 35 | 45 |
| 2013 | 28 | 66 |
| 2014 | 34 | 68 |
| 2015 | 46 | 87 |
| 2016 | 99 | 102 |
| 2017 | 112 | 124 |
| 2018 | 90 | 108 |
| 2019 | 85 | 84 |
| 2020 | 93 | 68 |
| 2021 | 63 | 69 |
| 2022 | 81 | 72 |
| 2023 | 67 | 67 |
| 2024 | 64 | 56 |
| 2025 | 56 | 51 |
| 2026 | 29 | 36 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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Most cited
By later US patents
- Exercise machine266US 7,803,095 B12010
- Articulated lower body exerciser231US 5,299,993 APacific Fitness Corporation · 1994
- Reformer exercise apparatus anchor bar assembly223US 7,163,500 B2Balanced Body, Inc. · 2007
- Exercise machine207US 8,641,585 B22014
- Computerized exercise system and method199US 6,280,361 B1Intelligent Automation, Inc. · 2001