A47C 7/4454
Of torsion type
Official title: {of torsion type}
A47C7/4454 (Of torsion type) appears on 58 US grants and 41 published applications in this corpus.
Search patents in A47C- Granted patents
- 58
- Published applications
- 41
- Assignees
- 34
- Inventors
- 87
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 4 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 3 | 3 |
| 2011 | 2 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 1 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 2 | 1 |
| 2017 | 1 | 2 |
| 2018 | 1 | 0 |
| 2019 | 2 | 2 |
| 2020 | 0 | 1 |
| 2021 | 3 | 2 |
| 2022 | 1 | 4 |
| 2023 | 5 | 6 |
| 2024 | 6 | 6 |
| 2025 | 3 | 1 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Rocking chair28 Apr 2026US 12,611,032 B2Zhejiang Sunshine Leisure Products Co., Ltd.
- Chair including a leaf spring in contact with a linkage to provide resistance to tilting of a backrest of the chair7 Oct 2025US 12,433,411 B2
- Stowaway compact rocker19 Aug 2025US 12,390,013 B2GCI Outdoor, Inc.
- Body support structure28 Jan 2025US 12,207,737 B2Steelcase Inc.
- Tiltable chair17 Sep 2024US 12,089,741 B2Quali Co., Ltd.
- Seating system19 Feb 2026US 2026/0047685 A1
- Reclining chair with counterbalance adjustment system19 Feb 2026US 2026/0047686 A1Current Products Corp.
- Chair including a leaf spring in contact with a linkage to provide resistance to tilting of a backrest of the chair1 Jan 2026US 2026/0000206 A1
- Body support structure26 Jun 2025US 2025/0204687 A1Steelcase Inc.
- Seating system26 Dec 2024US 2024/0423373 A1Current Products Corp.
Most cited
By later US patents
- Structure for connecting members181US 7,712,833 B2Kokuyo Furniture Co., Ltd. · 2010
- One-piece shell chair163US 4,529,247 AHerman Miller, Inc. · 1985
- Structure for attaching spring91US 7,434,879 B2Kokuyo Furniture Co., Ltd. · 2008
- Seats with twistable seat elements88US 6,910,736 B2Factory Design Limited · 2005
- Locking chair tilt mechanism with torsion bar75US 5,203,853 AHerman Miller, Inc. · 1993