- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F22B - Methods of steam generation; steam boilers
- F22B 37/12 - Forms of water tubes, e.g. of varying cross-section
Patent holdings for IPC class F22B 37/12
Total number of patents in this class: 35
10-year publication summary
|
4
|
3
|
2
|
4
|
5
|
4
|
1
|
3
|
0
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens AG | 24990 |
4 |
| Mitsubishi Power, Ltd. | 1680 |
3 |
| Mitsubishi Heavy Industries, Ltd. | 8217 |
2 |
| Doosan Heavy Industries & Construction Co., Ltd. | 604 |
2 |
| GE-Hitachi Nuclear Energy Americas LLC | 406 |
2 |
| Institute of Engineering Thermophysics, Chinese Academy of Sciences | 48 |
2 |
| Header-coil Company A/S | 4 |
2 |
| Burnham Services, Inc. | 48 |
1 |
| Cenovus Energy Inc. | 321 |
1 |
| Doosan Babcock Limited | 30 |
1 |
| Doosan Power Systems Limited | 19 |
1 |
| DRI-STEEM Corporation | 44 |
1 |
| Liebherr-Aerospace Toulouse SAS | 135 |
1 |
| Mitsubishi Hitachi Power Systems, Ltd. | 999 |
1 |
| Nippon Steel Corporation | 5649 |
1 |
| Nuovo Pignone S.p.A. | 96 |
1 |
| Propak Systems Ltd. | 24 |
1 |
| Xi'an Jiaotong University | 579 |
1 |
| Superior Boiler, LLC | 5 |
1 |
| Aalborg CSP A/S | 6 |
1 |
| Other owners | 5 |