E04F 11/0223
Cantilevered stairways
Official title: {Cantilevered stairways (E04F11/032 takes precedence)}
E04F11/0223 (Cantilevered stairways) appears on 7 US grants and 8 published applications in this corpus.
Search patents in E04F- Granted patents
- 7
- Published applications
- 8
- Assignees
- 8
- Inventors
- 10
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2015 | 1 | 1 |
| 2016 | 2 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 1 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Precast concrete stairway construction method25 Aug 2026US 12,716,243 B2Easycore Co., Ltd.
- Folding stair with tread overhang28 Oct 2025US 12,454,831 B2
- Cantilever stair assembly22 Aug 2023US 11,732,481 B2Construction & Design Solutions, Inc.
- Stair systems and wall assemblies comprising same20 Jun 2017US 9,683,372 B2Diamond Stairs Inc.
- Step-block precast stair24 May 2016US 9,347,224 B1Umm Al-Qura University
- Simplified staircase19 Jun 2025US 2025/0198164 A1Hemmi Kikaku Co., Ltd.
- Precast concrete stairway construction method17 Oct 2024US 2024/0344330 A1Easycore Co., Ltd.
- Folding Stair with Tread Overhang7 Dec 2023US 2023/0392383 A1
- Cantilever stair assembly31 Dec 2020US 2020/0407979 A1Construction & Design Solutions, Inc.
- Tower step pegs having safety locks9 May 2019US 2019/0136539 A1
Most cited
By later US patents