- All sections
- E - Fixed constructions
- E04D - Roof coveringssky-lightsguttersroof-working tools
- E04D 13/03 - Sky-lightsDomesVentilating sky-lights
Patent holdings for IPC class E04D 13/03
Total number of patents in this class: 356
10-year publication summary
|
31
|
35
|
38
|
29
|
34
|
21
|
25
|
34
|
27
|
19
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| VKR Holding A/S | 576 |
117 |
| T&M Inventions, LLC | 29 |
20 |
| Solatube International, Inc. | 63 |
15 |
| Guardian Glass, LLC | 574 |
15 |
| VKR Holding A/S | 15 |
11 |
| Eastman Chemical Company | 2215 |
6 |
| SVV Technology Innovations, Inc. | 115 |
5 |
| Rooftop Anchor, Inc. | 19 |
4 |
| Golf Pro Delivered, LLC | 5 |
3 |
| Marvin Lumber and Cedar Company | 40 |
3 |
| Oregon Health & Science University | 762 |
3 |
| Saint-Gobain Glass France | 3758 |
3 |
| Fakro PP Spolka Z O.O. | 12 |
3 |
| Sichuan Mcwell Ventilation Equipment Co., Ltd. | 3 |
3 |
| The Metal Window Co Ltd (Incorporated in The United Kingdom) | 3 |
3 |
| Outdoor Elements | 10 |
3 |
| ABL IP Holding LLC | 1903 |
2 |
| Arizona Board of Regents on behalf of Arizona State University | 2592 |
2 |
| Coelux S.r.l. | 94 |
2 |
| Crestron Electronics Inc. | 700 |
2 |
| Other owners | 131 |