A47C 7/446
With fluid springs
Official title: {with fluid springs}
A47C7/446 (With fluid springs) appears on 37 US grants and 31 published applications in this corpus.
Search patents in A47C- Granted patents
- 37
- Published applications
- 31
- Assignees
- 28
- Inventors
- 66
- Latest grant
- 30 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 1 |
| 2009 | 1 | 3 |
| 2010 | 1 | 2 |
| 2011 | 2 | 1 |
| 2012 | 1 | 3 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 1 | 2 |
| 2017 | 2 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 4 |
| 2021 | 2 | 3 |
| 2022 | 1 | 1 |
| 2023 | 3 | 4 |
| 2024 | 0 | 0 |
| 2025 | 3 | 2 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Chair with adjustable back depth30 Sep 2025US 12,426,714 B2Zhongshan Donati Co., Ltd
- Adjustment device for a chair with oscillating mechanism8 Jul 2025US 12,349,805 B2Brado S.P.A.
- Seating assembly for improved seating, ergonomic chairs or wheelchairs18 Mar 2025US 12,251,020 B2Superseating BVBA
- Ergonomic massage chair3 Oct 2023US 11,771,230 B2
- Seat connecting device with adjustable backrest12 Sep 2023US 11,751,691 B2Anji Deka Office System Co., Ltd.
- Seating system19 Feb 2026US 2026/0047685 A1
- Reclining chair with counterbalance adjustment system19 Feb 2026US 2026/0047686 A1Current Products Corp.
- Chair10 Jul 2025US 2025/0221534 A1
- Chair with adjustable back depth6 Feb 2025US 2025/0040716 A1Zhongshan Donati Co., Ltd
- Ergonomic Massage Chair21 Dec 2023US 2023/0404268 A1
Most cited
By later US patents
- Chair96US 4,521,053 AGispen & Staalmeubel B.V. · 1985
- Chair or couch with a movable back support88US 3,989,297 A1976
- Chair frame, control mechanism and upholstery60US 6,149,236 AVitra Patents AG · 2000
- Chair with adjustable back46US 4,007,962 AFehlbaum & Co. · 1977
- Adjustable seat41US 4,743,065 AGrammer Sitzsysteme GmbH · 1988