A47C 23/02
Spring mattresses with rigid frame or forming part of the bedstead: using
Official title: using leaf springs, e.g. metal strips (wooden springs A47C23/06)
A47C23/02 (Spring mattresses with rigid frame or forming part of the bedstead: using) appears on 84 US grants and 29 published applications in this corpus.
Search patents in A47C- Granted patents
- 84
- Published applications
- 29
- Assignees
- 30
- Inventors
- 84
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 8 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 2 |
| 2003 | 0 | 1 |
| 2004 | 2 | 3 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 2 |
| 2008 | 2 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 2 |
| 2014 | 1 | 1 |
| 2015 | 4 | 4 |
| 2016 | 2 | 3 |
| 2017 | 0 | 1 |
| 2018 | 2 | 1 |
| 2019 | 1 | 3 |
| 2020 | 1 | 0 |
| 2021 | 2 | 1 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 2 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Apparatus with a repeating trapezoidal mechanism that enables an alternating pressure support surface for preventing pressure injury21 Apr 2026US 12,605,295 B2K Medical LLC
- Multi-stable compliant-mechanism mattress for bed sore prevention25 Jun 2024US 12,016,811 B2The Regents of the University of California
- Bedding foundation having multiple lift actuators for massage effect26 Mar 2024US 11,937,698 B2L&P Property Management Company
- Bedding foundation having multiple lift actuators for massage effect9 May 2023US 11,641,947 B2L&P Property Management Company
- Machine and method for assembling a bedding foundation19 Apr 2022US 11,304,535 B2L&P Property Management Company
- Apparatus with a repeating trapezoidal mechanism that enables an alternating pressure support surface for preventing pressure injury5 Dec 2024US 2024/0398643 A1The Regents of the University of California
- Bedding Foundation Having Multiple Lift Actuators For Massage Effect27 Jul 2023US 2023/0232996 A1L&P Property Management Company
- Multi-stable compliant-mechanism mattress for bed sore prevention9 Jun 2022US 2022/0175601 A1The Regents of the University of California
- Bedding Foundation Having Multiple Lift Actuators For Massage Effect18 Nov 2021US 2021/0353071 A1L&P Property Management Company
- Machine and method for assembling a bedding foundation5 Dec 2019US 2019/0365114 A1L&P Property Management Company
Most cited
By later US patents
- Low profile composite material bedding foundation system and methods of manufacture67US 5,720,471 AOhio Mattress Company Licensing and Components Group · 1998
- Mattress system48US 5,426,799 ASuperba · 1995
- Elastic spring and spring support for mattress, chair or upholstery42US 5,632,473 A1997
- Steel wire foundation41US 4,377,279 ASteadley Company · 1983
- Collapsible box spring41US 4,771,995 ALeggett & Platt, Incorporated · 1988