A47C 3/20
Chairs or stools with vertically-adjustable seats
A47C3/20 (Chairs or stools with vertically-adjustable seats) appears on 924 US grants and 699 published applications in this corpus.
Search patents in A47C- Granted patents
- 924
- Published applications
- 699
- Assignees
- 403
- Inventors
- 1,405
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 7 | 0 |
| 1978 | 16 | 0 |
| 1979 | 9 | 0 |
| 1980 | 5 | 0 |
| 1981 | 10 | 0 |
| 1982 | 9 | 0 |
| 1983 | 8 | 0 |
| 1984 | 6 | 0 |
| 1985 | 8 | 0 |
| 1986 | 13 | 0 |
| 1987 | 13 | 0 |
| 1988 | 20 | 0 |
| 1989 | 18 | 0 |
| 1990 | 10 | 0 |
| 1991 | 11 | 0 |
| 1992 | 15 | 0 |
| 1993 | 12 | 0 |
| 1994 | 16 | 0 |
| 1995 | 17 | 0 |
| 1996 | 20 | 0 |
| 1997 | 12 | 0 |
| 1998 | 17 | 0 |
| 1999 | 19 | 0 |
| 2000 | 23 | 0 |
| 2001 | 19 | 6 |
| 2002 | 13 | 18 |
| 2003 | 11 | 15 |
| 2004 | 13 | 18 |
| 2005 | 13 | 17 |
| 2006 | 13 | 18 |
| 2007 | 12 | 22 |
| 2008 | 9 | 18 |
| 2009 | 13 | 10 |
| 2010 | 10 | 13 |
| 2011 | 7 | 18 |
| 2012 | 6 | 23 |
| 2013 | 16 | 13 |
| 2014 | 16 | 40 |
| 2015 | 40 | 42 |
| 2016 | 31 | 27 |
| 2017 | 29 | 41 |
| 2018 | 43 | 49 |
| 2019 | 55 | 51 |
| 2020 | 41 | 56 |
| 2021 | 50 | 37 |
| 2022 | 36 | 28 |
| 2023 | 33 | 25 |
| 2024 | 22 | 30 |
| 2025 | 27 | 35 |
| 2026 | 21 | 29 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- A47C 3/30With vertically-acting fluid cylinder386
- A47C 3/24With vertical spindle102
- A47C 3/40Telescopic guides86
- A47C 3/34With pins coacting with holes59
- A47C 3/28With clamps acting on vertical rods49
- A47C 3/38With additional seat or additional legs for varying height of seat45
- A47C 3/36With means, or adapted, for inclining the legs of the chair or37
- A47C 3/22With balancing device35
All 10 subgroupsShow fewer
Recent patents
- Bath chair6 Oct 2026US 12,751,583 B2
- Hanging seat with adjustable seat surface height29 Sep 2026US 12,745,844 B1Zhejiang Hengfeng Top Leisure Co., Ltd.
- Customizable foldable chair29 Sep 2026US 12,745,845 B2Letsgetout Inc.
- Base frame assembly and chair having the same8 Sep 2026US 12,727,673 B2Zhongshan Meisihe Furniture Co., Ltd.
- System and method for automatically setting preferred workstation heights to increase human movement and promote wellness25 Aug 2026US 12,714,222 B1Steelcase Inc.
- Multi Pivot Tilting Seat Support Structure1 Oct 2026US 2026/0294105 A1Levitask
- Pivoting support mechanism for chairs and other structures1 Oct 2026US 2026/0294113 A1Krueger International, Inc.
- Self Leveling Balancing System for Moveable Objects24 Sep 2026US 2026/0283359 A1
- Chair for the sitting of a user10 Sep 2026US 2026/0262853 A1Cerantola S.P.A.
- Height adjustable battery operated chair3 Sep 2026US 2026/0256289 A1Comfortel Furniture Pty Ltd
Most cited
By later US patents
- Woven fabric membrane for a seating surface256US 6,035,901 AHerman Miller, Inc. · 2000
- Office chair249US 6,059,368 AHerman Miller, Inc. · 2000
- Office chair224US 6,386,634 B1Herman Miller, Inc. · 2002
- Backrest199US 6,588,842 B2Herman Miller, Inc. · 2003
- Seating structure having a backrest with a bowed section176US 6,722,741 B2Herman Miller, Inc. · 2004