A61F 2002/5073
Helical springs
Official title: {Helical springs, e.g. having at least one helical spring}
A61F2002/5073 (Helical springs) appears on 294 US grants and 260 published applications in this corpus.
Search patents in A61F- Granted patents
- 294
- Published applications
- 260
- Assignees
- 125
- Inventors
- 492
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 5 | 0 |
| 1996 | 7 | 0 |
| 1997 | 5 | 0 |
| 1998 | 11 | 0 |
| 1999 | 9 | 0 |
| 2000 | 6 | 0 |
| 2001 | 4 | 0 |
| 2002 | 7 | 5 |
| 2003 | 4 | 6 |
| 2004 | 4 | 9 |
| 2005 | 5 | 10 |
| 2006 | 7 | 12 |
| 2007 | 5 | 9 |
| 2008 | 7 | 8 |
| 2009 | 8 | 6 |
| 2010 | 6 | 9 |
| 2011 | 4 | 12 |
| 2012 | 5 | 9 |
| 2013 | 5 | 8 |
| 2014 | 14 | 13 |
| 2015 | 7 | 10 |
| 2016 | 9 | 16 |
| 2017 | 9 | 11 |
| 2018 | 12 | 21 |
| 2019 | 14 | 10 |
| 2020 | 16 | 10 |
| 2021 | 10 | 20 |
| 2022 | 15 | 17 |
| 2023 | 12 | 12 |
| 2024 | 11 | 4 |
| 2025 | 9 | 6 |
| 2026 | 2 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Biomedical finger assembly with ratcheting lock4 Aug 2026US 12,697,232 B2RCM Enterprise LLC
- Biomedical finger assembly with ratcheting lock10 Feb 2026US 12,544,242 B2RCM Enterprise LLC
- Prosthetic foot with removable flexible members23 Dec 2025US 12,502,288 B2Ossur Iceland Ehf
- Prosthetic device11 Nov 2025US 12,465,501 B2Ottobock SE & Co. Kgaa
- Powered prosthesis with torque-sensitive actuation7 Oct 2025US 12,433,771 B1University of Utah Research Foundation
- 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
- Foot and ankle prosthesis30 Jul 2026US 2026/0215936 A1Universidad Autonoma Del Estado De Mexico
- Torsion adapter23 Jul 2026US 2026/0207354 A1
- Prosthetic foot with removable flexible members21 May 2026US 2026/0137529 A1Ossur Iceland Ehf
Most cited
By later US patents
- Method and apparatus for making prosthetic socket preforms, prosthetic sockets, and socket attachment component170US 5,376,129 ABoard of Regents, The University of Texas System · 1994
- System and method for motion-controlled foot unit169US 7,431,737 B2Ossur Hf · 2008
- Composite prosthetic foot and leg150US 4,547,913 AFlex-Foot, Inc. · 1985
- Sensing system and method for motion-controlled foot unit140US 7,531,006 B2Ossur Hf · 2009
- Method for donning or doffing an artificial limb136US 5,658,353 A1997