- All sections
- E - Fixed constructions
- E04D - Roof coverings; sky-lights; gutters; roof-working tools
- E04D 3/35 - Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation
Patent holdings for IPC class E04D 3/35
Total number of patents in this class: 265
10-year publication summary
|
23
|
21
|
22
|
30
|
31
|
19
|
29
|
32
|
24
|
2
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kingspan Research and Developments Limited | 39 |
19 |
| Bmic LLC | 630 |
16 |
| Johns Manville | 980 |
12 |
| Huber Engineered Woods LLC | 128 |
11 |
| Rockwool A/S | 753 |
9 |
| Kingspan Holdings (IRL) Limited | 389 |
7 |
| Louisiana-Pacific Corporation | 203 |
6 |
| Nisshin Steel Co., Ltd. | 401 |
6 |
| BlueScope Steel Limited | 223 |
5 |
| Holcim Technology Ltd. | 868 |
4 |
| Siplast, Inc. | 47 |
4 |
| Carlisle Construction Materials, LLC | 79 |
4 |
| I-solar Energy Co., Ltd. | 8 |
3 |
| ISOPAN S.p.A. | 11 |
3 |
| SABIC Global Technologies B.V. | 4044 |
3 |
| ROCKWOOL International A/S | 323 |
3 |
| West.neder.land. Sandwich Panelen B.V. | 3 |
3 |
| BlueScope Buildings North America, Inc. | 76 |
2 |
| CertainTeed Corporation | 299 |
2 |
| Cupa Innovacion, S.L.U. | 13 |
2 |
| Other owners | 141 |