A61F 2/74
Fluid , i.e. hydraulic or pneumatic
Official title: fluid {, i.e. hydraulic or pneumatic}
A61F2/74 (Fluid , i.e. hydraulic or pneumatic) appears on 593 US grants and 699 published applications in this corpus.
Search patents in A61F- Granted patents
- 593
- Published applications
- 699
- Assignees
- 215
- Inventors
- 879
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 2 | 0 |
| 1994 | 8 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 11 | 0 |
| 1999 | 12 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 4 |
| 2002 | 5 | 10 |
| 2003 | 12 | 13 |
| 2004 | 15 | 19 |
| 2005 | 11 | 18 |
| 2006 | 7 | 23 |
| 2007 | 7 | 20 |
| 2008 | 10 | 25 |
| 2009 | 9 | 21 |
| 2010 | 17 | 24 |
| 2011 | 22 | 28 |
| 2012 | 16 | 20 |
| 2013 | 21 | 29 |
| 2014 | 23 | 28 |
| 2015 | 31 | 38 |
| 2016 | 23 | 38 |
| 2017 | 32 | 35 |
| 2018 | 27 | 51 |
| 2019 | 39 | 38 |
| 2020 | 35 | 45 |
| 2021 | 36 | 38 |
| 2022 | 32 | 43 |
| 2023 | 28 | 35 |
| 2024 | 27 | 23 |
| 2025 | 20 | 23 |
| 2026 | 12 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Prosthetic knee joint, prosthetic knee joint power generating method, and tangible computer-readable storage medium storing program1 Sep 2026US 12,721,738 B2Nabtesco Corporation
- Closed-loop fluidic regenerative system and active compression band, apparel, device, footwear and method18 Aug 2026US 12,708,532 B2
- Prosthetic foot14 Jul 2026US 12,678,303 B2Ottobock SE & Co. Kgaa
- Hydraulic prosthetic ankle23 Jun 2026US 12,661,242 B2College Park Industries, Inc.
- Vacuum pump systems for prosthetic limbs and methods of using the same23 Jun 2026US 12,661,243 B2Northwestern University
- Artificial knee joint, adjustment support apparatus for artificial knee joint, method of controlling artificial knee joint, and program to control artificial knee joint8 Oct 2026US 2026/0306280 A1Nabtesco Corporation
- Vacuum Pump Systems for Prosthetic Limbs and Methods of Using the Same1 Oct 2026US 2026/0294652 A1Northwestern University
- Dilatancy in an adjustable prosthesis30 Jul 2026US 2026/0215939 A1Rehabilitation Institute of Chicago
- Anatomically aligned prosthetic foot18 Jun 2026US 2026/0165854 A1Loma Linda University
- Prosthetic foot with removable flexible members21 May 2026US 2026/0137529 A1Ossur Iceland Ehf
Most cited
By later US patents
- Application of an improved damper to an intervertebral stabilization device769US 5,375,823 ASociete PSI · 1994
- System for controlling artificial knee joint action in an above knee prosthesis315US 5,571,205 A1996
- Three axis mechanical joint for a power assist device248US 5,282,460 A1994
- Self-adjusting prosthetic ankle apparatus247US 6,443,993 B12002
- Computer controlled hydraulic resistance device for a prosthesis and other apparatus206US 5,888,212 AMauch, Inc. · 1999