A47C 23/043
Using wound springs
Official title: using wound springs
A47C23/043 (Using wound springs) appears on 241 US grants and 181 published applications in this corpus.
Search patents in A47C- Granted patents
- 241
- Published applications
- 181
- Assignees
- 82
- Inventors
- 237
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 4 | 0 |
| 1978 | 6 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 5 | 0 |
| 1986 | 5 | 0 |
| 1987 | 14 | 0 |
| 1988 | 13 | 0 |
| 1989 | 6 | 0 |
| 1990 | 7 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 5 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 3 | 2 |
| 2003 | 1 | 1 |
| 2004 | 4 | 5 |
| 2005 | 4 | 2 |
| 2006 | 4 | 5 |
| 2007 | 3 | 6 |
| 2008 | 6 | 3 |
| 2009 | 2 | 4 |
| 2010 | 0 | 1 |
| 2011 | 1 | 4 |
| 2012 | 3 | 9 |
| 2013 | 8 | 9 |
| 2014 | 11 | 7 |
| 2015 | 5 | 11 |
| 2016 | 9 | 6 |
| 2017 | 0 | 4 |
| 2018 | 4 | 8 |
| 2019 | 4 | 9 |
| 2020 | 8 | 8 |
| 2021 | 7 | 16 |
| 2022 | 9 | 15 |
| 2023 | 8 | 8 |
| 2024 | 7 | 21 |
| 2025 | 12 | 13 |
| 2026 | 8 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Mattresses including stacked elastomeric layers and related methods for same9 Jun 2026US 12,648,654 B1Purple Innovation, LLC
- Spring having positioning ring and elastic mattress2 Jun 2026US 12,642,362 B2
- Spring module and spring cushion for furniture19 May 2026US 12,628,960 B2New-Tec Integration (Xiamen) Co., Ltd.
- Spring module and spring cushion for furniture28 Apr 2026US 12,611,045 B2
- Elastic cushion, additional elastic cushion layer, and furniture17 Mar 2026US 12,575,684 B2
- Mattresses including stacked elastomeric layers and related methods for same17 Sep 2026US 2026/0272185 A1Purple Innovation, LLC
- Spring module and spring cushion for furniture16 Jul 2026US 2026/0198698 A1New-Tec Integration (Xiamen) Co., Ltd.
- Elastic module and elastic cushion19 Mar 2026US 2026/0076487 A1
- Spring mattress with pillow20 Nov 2025US 2025/0351982 A1
- Foldable base plate of elastic mattress and elastic mattress9 Oct 2025US 2025/0311854 A1
Most cited
By later US patents
- Mattress system116US 5,513,402 A1996
- Pneumatic bed assembly101US 4,306,322 ADial-A-Firm, Inc. · 1981
- Pneumatic bed88US 4,224,706 ADial-A-Firm, Inc. · 1980
- Apparatuses and methods providing variable support and variable comfort control of a sleep system and automatic adjustment thereof78US 8,341,786 B2Kingsdown, Inc. · 2013
- Asymmetric spring components and innersprings for one-sided mattresses77US 7,178,187 B2Sealy Technology, LLC · 2007