- All sections
- E - Fixed constructions
- E04F - Finishing work on buildings, e.g. stairs, floors
- E04F 11/04 - Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible
Patent holdings for IPC class E04F 11/04
Total number of patents in this class: 33
10-year publication summary
|
1
|
2
|
8
|
4
|
8
|
3
|
3
|
6
|
2
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Fortress Iron, LP | 129 |
3 |
| Emeh, Inc. | 87 |
2 |
| Fakro PP Sp. z o. o. | 9 |
2 |
| Georgia Tech Research Corporation | 2744 |
1 |
| British Columbia Institute of Technology | 40 |
1 |
| Emory University | 1622 |
1 |
| Floodbreak, L.L.C. | 33 |
1 |
| Kuwait University | 75 |
1 |
| Metaltech-Omega Inc. | 25 |
1 |
| Morryde International, Inc. | 38 |
1 |
| Nabors Drilling Technologies USA, Inc. | 561 |
1 |
| New Century Buildings L.L.C. | 6 |
1 |
| Ottawa Hospital Research Institute | 108 |
1 |
| Owens Corning Intellectual Capital, LLC | 1632 |
1 |
| PERI GmbH | 168 |
1 |
| Vanderburgh, Matthew | 1 |
1 |
| Majic Stairs, Inc. | 3 |
1 |
| BEA Architects, Inc. | 7 |
1 |
| Calibre Enterprises Limited | 3 |
1 |
| Davibois Inc. | 1 |
1 |
| Other owners | 9 |