A61F 2002/5075
Multiple spring systems including two or more helical springs
Official title: {Multiple spring systems including two or more helical springs}
A61F2002/5075 (Multiple spring systems including two or more helical springs) appears on 143 US grants and 131 published applications in this corpus.
Search patents in A61F- Granted patents
- 143
- Published applications
- 131
- Assignees
- 60
- Inventors
- 240
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 7 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 3 |
| 2003 | 3 | 4 |
| 2004 | 2 | 7 |
| 2005 | 3 | 3 |
| 2006 | 2 | 3 |
| 2007 | 2 | 5 |
| 2008 | 4 | 5 |
| 2009 | 3 | 3 |
| 2010 | 2 | 6 |
| 2011 | 1 | 8 |
| 2012 | 2 | 5 |
| 2013 | 4 | 5 |
| 2014 | 10 | 8 |
| 2015 | 2 | 2 |
| 2016 | 5 | 9 |
| 2017 | 2 | 5 |
| 2018 | 8 | 9 |
| 2019 | 7 | 6 |
| 2020 | 9 | 5 |
| 2021 | 3 | 8 |
| 2022 | 10 | 8 |
| 2023 | 5 | 8 |
| 2024 | 5 | 2 |
| 2025 | 3 | 1 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Prosthetic foot with removable flexible members23 Dec 2025US 12,502,288 B2Ossur Iceland Ehf
- Powered prosthesis with torque-sensitive actuation7 Oct 2025US 12,433,771 B1University of Utah Research Foundation
- Prosthetic attachment system4 Mar 2025US 12,239,553 B2Ossur Iceland Ehf
- Wrist device for a prosthetic limb24 Sep 2024US 12,097,131 B2Touch Bionics Limited
- Upper extremity prosthetic with energy return system30 Apr 2024US 11,969,362 B2Accenture Global Solutions Limited
- Powered prosthesis with torque-sensitive actuation17 Sep 2026US 2026/0272681 A1University of Utah Research Foundation
- Improved mechanical joints that include a compact, bypassable, single-spring or nested-spring wrap-spring clutch20 Aug 2026US 2026/0240666 A1
- Prosthetic foot with removable flexible members21 May 2026US 2026/0137529 A1Ossur Iceland Ehf
- Prosthetic wrist9 Jan 2025US 2025/0009527 A1Otto Bock Healthcare Products GmbH
- Orthopedic joint device3 Oct 2024US 2024/0325184 A1Otto Bock Healthcare Products GmbH
Most cited
By later US patents
- Composite prosthetic foot and leg150US 4,547,913 AFlex-Foot, Inc. · 1985
- Method for donning or doffing an artificial limb136US 5,658,353 A1997
- Artificial joints using agonist-antagonist actuators129US 8,870,967 B2Massachusetts Institute of Technology · 2014
- Parallel linkage and artificial joint device using the same127US 7,118,601 B2Honda Giken Kogyo Kabushiki Kaisha · 2006
- Prosthetic foot having Z shaped insert114US 5,062,859 AOtto Bock Orthopaedische Industrie Besitz- und Verwaltungs-Kommanditgesel lschaft · 1991