A47C 23/12
Spring mattresses with rigid frame or forming part of the bedstead: using
Official title: using tensioned springs, e.g. flat type (A47C23/02 takes precedence)
A47C23/12 (Spring mattresses with rigid frame or forming part of the bedstead: using) appears on 94 US grants and 63 published applications in this corpus.
Search patents in A47C- Granted patents
- 94
- Published applications
- 63
- Assignees
- 52
- Inventors
- 145
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 4 |
| 2003 | 3 | 3 |
| 2004 | 1 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 3 |
| 2007 | 2 | 1 |
| 2008 | 3 | 3 |
| 2009 | 1 | 2 |
| 2010 | 1 | 2 |
| 2011 | 1 | 2 |
| 2012 | 0 | 1 |
| 2013 | 2 | 1 |
| 2014 | 2 | 8 |
| 2015 | 2 | 7 |
| 2016 | 8 | 3 |
| 2017 | 5 | 2 |
| 2018 | 3 | 2 |
| 2019 | 1 | 4 |
| 2020 | 2 | 1 |
| 2021 | 2 | 3 |
| 2022 | 4 | 2 |
| 2023 | 1 | 2 |
| 2024 | 1 | 3 |
| 2025 | 1 | 1 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- A47C 23/26Frames therefor28
- A47C 23/18Of resilient webbing27
- A47C 23/24Using tensioned textile or other non-resilient strips16
- A47C 23/14Forming nets15
- A47C 23/16Of plane meandering type15
- A47C 23/28Tensioning devices therefor14
- A47C 23/20Of resilient sheet form9
- A47C 23/125Using vertically mounted tension springs6
All 9 subgroupsShow fewer
Recent patents
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Most cited
By later US patents
- Oriented net furniture support material80US 4,469,738 AE. I. Du Pont de Nemours and Company · 1984
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