E06C 1/3835
Having collapsible steps comprising a hinge in their central part
Official title: {having collapsible steps comprising a hinge in their central part}
E06C1/3835 (Having collapsible steps comprising a hinge in their central part) appears on 23 US grants and 11 published applications in this corpus.
Search patents in E06C- Granted patents
- 23
- Published applications
- 11
- Assignees
- 11
- Inventors
- 34
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 2 | 3 |
| 2005 | 2 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 2 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 2 |
| 2024 | 0 | 0 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
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- Vehicular ladder system and methods of making and using same24 Jun 2025US 12,337,796 B1Kelly Industries, LLC
- Collapsible ladder30 Nov 2021US 11,187,037 B2
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- Ladder with side support enhancement15 Mar 2005US 6,866,119 B2
- Foldable ladder7 Dec 2023US 2023/0392442 A1Zhejiang King Chance Co., Ltd.
- Ladder20 Apr 2023US 2023/0119062 A1Jiangsu Zhou Jijie Intelligent Technology Co., Ltd.
- Two-step step stool3 Nov 2022US 2022/0349254 A1Jiangsu Zhou Jijie Intelligent Technology Co., Ltd.
- Collapsible ladder20 Aug 2020US 2020/0263495 A1
- Horizontally extendable ladder19 Dec 2019US 2019/0383098 A1
Most cited
By later US patents