A47C 7/445
With bar or leaf springs
Official title: {with bar or leaf springs}
A47C7/445 (With bar or leaf springs) appears on 319 US grants and 232 published applications in this corpus.
Search patents in A47C- Granted patents
- 319
- Published applications
- 232
- Assignees
- 121
- Inventors
- 372
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 7 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 7 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 6 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 7 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 1 |
| 2002 | 10 | 6 |
| 2003 | 3 | 7 |
| 2004 | 8 | 9 |
| 2005 | 9 | 11 |
| 2006 | 10 | 7 |
| 2007 | 3 | 9 |
| 2008 | 7 | 4 |
| 2009 | 4 | 14 |
| 2010 | 8 | 7 |
| 2011 | 6 | 7 |
| 2012 | 8 | 10 |
| 2013 | 6 | 7 |
| 2014 | 8 | 9 |
| 2015 | 10 | 12 |
| 2016 | 8 | 12 |
| 2017 | 17 | 13 |
| 2018 | 11 | 11 |
| 2019 | 11 | 11 |
| 2020 | 12 | 7 |
| 2021 | 12 | 11 |
| 2022 | 7 | 8 |
| 2023 | 14 | 10 |
| 2024 | 11 | 14 |
| 2025 | 8 | 9 |
| 2026 | 6 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Weight responsive chair30 Jun 2026US 12,667,191 B2Haworth, Inc.
- Chair and components2 Jun 2026US 12,642,356 B2Formway Furniture Limited
- Chair tilt system with leaf spring26 May 2026US 12,635,796 B2Fellowes, Inc.
- Rocking chair28 Apr 2026US 12,611,032 B2Zhejiang Sunshine Leisure Products Co., Ltd.
- Seating arrangement24 Mar 2026US 12,582,234 B2Steelcase Inc.
- Weight responsive chair1 Oct 2026US 2026/0294106 A1Haworth, Inc.
- Ergonomic chair18 Jun 2026US 2026/0165483 A1Kinetik Solutions, LLC
- Seating system19 Feb 2026US 2026/0047685 A1
- Reclining chair with counterbalance adjustment system19 Feb 2026US 2026/0047686 A1Current Products Corp.
- Conveniently adjustable seat backrest structure5 Feb 2026US 2026/0033637 A1
Most cited
By later US patents
- Chair with novel seat construction283US 5,871,258 ASteelcase Inc. · 1999
- Lumbar device238US 6,394,546 B1Steelcase Development Corporation · 2002
- Chair including novel back construction227US 5,975,634 ASteelcase Development Corporation · 1999
- Chair having a back comprising a plurality of articulated segments191US 4,585,272 ACastelli S.p.A. · 1986
- Structure for connecting members181US 7,712,833 B2Kokuyo Furniture Co., Ltd. · 2010