E04F 21/26
Implements for finishing work on buildings: for mounting staircases
Official title: for mounting staircases, e.g. tools for marking steps
E04F21/26 (Implements for finishing work on buildings: for mounting staircases) appears on 59 US grants and 46 published applications in this corpus.
Search patents in E04F- Granted patents
- 59
- Published applications
- 46
- Assignees
- 18
- Inventors
- 99
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 2 |
| 2003 | 3 | 1 |
| 2004 | 3 | 2 |
| 2005 | 4 | 4 |
| 2006 | 1 | 4 |
| 2007 | 2 | 3 |
| 2008 | 1 | 1 |
| 2009 | 1 | 2 |
| 2010 | 1 | 1 |
| 2011 | 3 | 3 |
| 2012 | 3 | 3 |
| 2013 | 1 | 2 |
| 2014 | 3 | 0 |
| 2015 | 3 | 2 |
| 2016 | 1 | 1 |
| 2017 | 1 | 2 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 2 | 3 |
| 2021 | 1 | 1 |
| 2022 | 1 | 3 |
| 2023 | 3 | 1 |
| 2024 | 2 | 1 |
| 2025 | 0 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Modular staircase1 Sep 2026US 12,723,410 B2NxGen Homes Pty Ltd
- Modular level access structures16 Jun 2026US 12,655,638 B2
- Staircase handrail support device12 Nov 2024US 12,139,916 B2
- Modular staircase systems30 Apr 2024US 11,970,865 B2CB Interests Inc.
- Handrail installation device27 Jun 2023US 11,686,567 B2
- Trim tool18 Jun 2026US 2026/0168264 A1Rider Coolers LLC
- Robot-deployable accessibility system19 Mar 2026US 2026/0078586 A1United Kingdom Atomic Energy Authority
- Modular level access structures27 Feb 2025US 2025/0067056 A1
- Modular staircase22 Aug 2024US 2024/0279936 A1NxGen Homes Pty Ltd
- Handrail installation device20 Apr 2023US 2023/0117811 A1
Most cited
By later US patents