E04F 11/064
With stringers overlapping when folded
Official title: {with stringers overlapping when folded}
E04F11/064 (With stringers overlapping when folded) appears on 57 US grants and 62 published applications in this corpus.
Search patents in E04F- Granted patents
- 57
- Published applications
- 62
- Assignees
- 19
- Inventors
- 106
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 6 |
| 2006 | 3 | 4 |
| 2007 | 2 | 4 |
| 2008 | 1 | 3 |
| 2009 | 3 | 3 |
| 2010 | 1 | 3 |
| 2011 | 1 | 0 |
| 2012 | 2 | 2 |
| 2013 | 2 | 1 |
| 2014 | 1 | 1 |
| 2015 | 3 | 2 |
| 2016 | 3 | 3 |
| 2017 | 2 | 1 |
| 2018 | 2 | 2 |
| 2019 | 2 | 2 |
| 2020 | 2 | 2 |
| 2021 | 0 | 2 |
| 2022 | 1 | 2 |
| 2023 | 1 | 4 |
| 2024 | 2 | 4 |
| 2025 | 6 | 6 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Door and retractable ladder assembly23 Jun 2026US 12,662,821 B1
- Adaptive supporting structure of stairway for accessing space above or below an elevated structure13 Jan 2026US 12,523,042 B1
- Attic stairs with a support beam23 Dec 2025US 12,503,861 B2Fakro Pp Sp. Z O.O.
- Folding stair with tread overhang28 Oct 2025US 12,454,831 B2
- Folding staircase30 Sep 2025US 12,428,850 B2Morryde International, Inc.
- Folding staircase10 Sep 2026US 2026/0266060 A1Calbah Industries Pty Ltd
- Attic stairs7 May 2026US 2026/0125907 A1Sj industries Inc.
- Folding staircase8 Jan 2026US 2026/0009230 A1Morryde International, Inc.
- Insulation hatch with a spacer and attic stairs with the insulation hatch20 Nov 2025US 2025/0354386 A1Fakro Pp Sp. Z O.O.
- Box enclosure hoist assembly, box enclosure and method for changing hoist assembly spring end attachment position18 Sep 2025US 2025/0290325 A1Fakro Pp Sp. Z O.O.
Most cited
By later US patents
- Insulating enclosure for disappearing stairway44US 4,281,743 A1981
- Foldable or retractable ladder for mounting in a ceiling37US 4,541,508 A1985
- Insulating system for attic stairs and the like37US 5,475,955 A1995
- Packaging and energy saving devices and methods33US 4,312,423 A1982
- Insulation cap for disappearing stairwells31US 4,344,505 A1982