- All sections
- E - Fixed constructions
- E04B - General building constructionswalls, e.g. partitionsroofsfloorsceilingsinsulation or other protection of buildings
- E04B 2/28 - Walls having cavities between, but not in, the elementsWalls of elements each consisting of two or more parts kept in distance by means of spacers, all parts being solid
Patent holdings for IPC class E04B 2/28
Total number of patents in this class: 56
10-year publication summary
|
5
|
2
|
5
|
3
|
2
|
2
|
5
|
1
|
2
|
5
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Keene Building Products Co., Inc. | 30 |
3 |
| Covestro LLC | 617 |
2 |
| Evolve Manufacturing, LLC | 3 |
2 |
| James Hardie Technology Limited | 458 |
2 |
| Simpson Strong-Tie Company, Inc. | 749 |
2 |
| Miralex Technologies | 2 |
2 |
| LG Electronics Inc. | 76219 |
1 |
| Acciona Infraestructuras, S.A. | 13 |
1 |
| Anchor Wall Systems, Inc. | 129 |
1 |
| Aspenson, Mark A. | 9 |
1 |
| Benjamin Obdyke Incorporated | 47 |
1 |
| Composite Technologies Corporation | 5 |
1 |
| Ecoraw, s.r.o. | 4 |
1 |
| FERO Corporation | 50 |
1 |
| Herron Intellectual Property Holdings, LLC | 4 |
1 |
| Innovative Building Technologies, LLC | 66 |
1 |
| Krones AG | 2304 |
1 |
| Lockwood Buildings Limited | 2 |
1 |
| Nehemiah Elite Wall Systems, Inc. | 3 |
1 |
| Nichiha Corporation | 166 |
1 |
| Other owners | 29 |