A47C 7/004
For chairs or stools with central column
Official title: {for chairs or stools with central column, e.g. office chairs}
A47C7/004 (For chairs or stools with central column) appears on 431 US grants and 404 published applications in this corpus.
Search patents in A47C- Granted patents
- 431
- Published applications
- 404
- Assignees
- 192
- Inventors
- 607
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 7 | 0 |
| 2000 | 8 | 0 |
| 2001 | 4 | 0 |
| 2002 | 4 | 8 |
| 2003 | 5 | 8 |
| 2004 | 5 | 5 |
| 2005 | 4 | 6 |
| 2006 | 3 | 7 |
| 2007 | 5 | 7 |
| 2008 | 6 | 8 |
| 2009 | 3 | 5 |
| 2010 | 3 | 3 |
| 2011 | 8 | 6 |
| 2012 | 6 | 9 |
| 2013 | 4 | 5 |
| 2014 | 6 | 30 |
| 2015 | 24 | 29 |
| 2016 | 26 | 23 |
| 2017 | 31 | 31 |
| 2018 | 25 | 28 |
| 2019 | 35 | 34 |
| 2020 | 29 | 25 |
| 2021 | 27 | 19 |
| 2022 | 22 | 23 |
| 2023 | 29 | 19 |
| 2024 | 13 | 25 |
| 2025 | 20 | 24 |
| 2026 | 14 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Seat6 Oct 2026US D1,150,944 S1Humanscale Corporation · Design
- Removal mechanism1 Sep 2026US 12,721,444 B2L&P Property Management Company
- Chair18 Aug 2026US 12,708,213 B2Okamura Corporation
- Ergonomic seating system, tilt-lock control and remote powering method and apparatus7 Jul 2026US 12,672,718 B1Steelcase Inc.
- Motion simulator chair7 Jul 2026US 12,672,722 B2D-Box Technologies Inc.
- Footrest Positioning and Adjustment Mechanism for Chairs8 Oct 2026US 2026/0305829 A1Hsin Chernq Enterprise Co., Ltd.
- Chair for the sitting of a user10 Sep 2026US 2026/0262841 A1Cerantola S.P.A.
- Chair for the sitting of a user10 Sep 2026US 2026/0262853 A1Cerantola S.P.A.
- Apparatus and methods for the understructure of a chair base30 Jul 2026US 2026/0215589 A1Medway Plastics Corporation
- Chair assembly16 Jul 2026US 2026/0198690 A1Dick's Sporting Goods, Inc.
Most cited
By later US patents
- Chair construction187US 6,523,898 B1Steelcase Development Corporation · 2003
- Reclinable chair146US 7,798,573 B2Formway Furniture Limited · 2010
- Chair construction142US 6,913,315 B2Steelcase Development Corporation · 2005
- Lumbar support141US 6,874,852 B2Formway Furniture Limited · 2005
- Height adjustable seat tube with oil storage unit128US 9,073,592 B22015