E04F 11/09
Tread-and-riser units
E04F11/09 (Tread-and-riser units) appears on 17 US grants and 25 published applications in this corpus.
Search patents in E04F- Granted patents
- 17
- Published applications
- 25
- Assignees
- 16
- Inventors
- 45
- Latest grant
- 30 Apr 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 1 |
| 2013 | 1 | 2 |
| 2014 | 1 | 2 |
| 2015 | 1 | 1 |
| 2016 | 2 | 2 |
| 2017 | 2 | 1 |
| 2018 | 1 | 3 |
| 2019 | 1 | 2 |
| 2020 | 1 | 2 |
| 2021 | 0 | 1 |
| 2022 | 2 | 3 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
| 2025 | 0 | 1 |
By publication year.
Recent patents
- Modular staircase systems30 Apr 2024US 11,970,865 B2CB Interests Inc.
- Fully-assembled staircase system and assembly method4 Jul 2023US 11,692,356 B2Changzhou Vocational Institute of Engineering
- Snap lock system, method and use for connecting construction elements9 Aug 2022US 11,406,184 B2Humeneq AS
- System and method for automating construction and installation of surfaces in construction17 May 2022US 11,332,942 B2Form Robotics Inc.
- Stackable step component with adjustable tread incline11 Aug 2020US 10,738,474 B1
- Stairway, set of stairs and method for producing a set of stairs3 Apr 2025US 2025/0109595 A1Peri SE
- Stair system13 Jun 2024US 2024/0191507 A1The AZEK Group LLC
- Stair stringer assembly, system, and method5 Oct 2023US 2023/0313535 A1
- Fully-assembled staircase system and assembly method18 Aug 2022US 2022/0259864 A1Changzhou Vocational Institute of Engineering
- System and method for automating construction and installation of surfaces in construction18 Aug 2022US 2022/0259865 A1Form Robotics Inc.
Most cited
By later US patents