- All sections
- E - Fixed constructions
- E04H - Buildings or like structures for particular purposesswimming or splash baths or poolsmastsfencingtents or canopies, in general
- E04H 12/28 - Chimney stacks, e.g. free-standing, or similar ducts
Patent holdings for IPC class E04H 12/28
Total number of patents in this class: 40
10-year publication summary
|
0
|
4
|
0
|
0
|
1
|
1
|
2
|
1
|
0
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Besterra Co., Ltd. | 9 |
2 |
| D'herville, Florence Anne | 2 |
2 |
| Hitachi Zosen Corporation | 613 |
2 |
| Taiyo Kogyo Corporation | 20 |
2 |
| Vanocur Refractories, L.L.C. | 34 |
2 |
| Siemens Gamesa Renewable Energy A/S | 1917 |
2 |
| O'daniels, LLC. | 60 |
2 |
| Aztec Manufacturing, Inc. | 17 |
1 |
| BRI Energy Solutions Limited | 3 |
1 |
| Daewon Electric Co. Ltd. | 58 |
1 |
| Ecotecnia Energias Renovables S.L. | 8 |
1 |
| Flexmaster Canada Ltd. | 25 |
1 |
| Hainan University | 166 |
1 |
| Johnson, Christine Marie | 1 |
1 |
| Moore, Nicholas Peter | 1 |
1 |
| Placefull, Inc. | 1 |
1 |
| Sabre Communications Corporation | 11 |
1 |
| Seaman Corporation | 57 |
1 |
| Carlisle Construction Materials, LLC | 160 |
1 |
| RAZ systems GmbH | 4 |
1 |
| Other owners | 13 |