- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 25/30 - Exhaust heads, chambers, or the like
Patent holdings for IPC class F01D 25/30
Total number of patents in this class: 803
10-year publication summary
107
|
120
|
88
|
74
|
68
|
48
|
61
|
62
|
36
|
8
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Rtx Corporation | 8674 |
86 |
GE Infrastructure Technology, LLC | 5873 |
83 |
Pratt & Whitney Canada Corp. | 4215 |
68 |
Siemens AG | 24990 |
47 |
Mitsubishi Heavy Industries, Ltd. | 8217 |
43 |
Mitsubishi Power, Ltd. | 1680 |
31 |
General Electric Company | 18133 |
29 |
Siemens Energy, Inc. | 1770 |
25 |
Safran Aircraft Engines | 5739 |
25 |
Mitsubishi Hitachi Power Systems, Ltd. | 999 |
22 |
United Technologies Corporation | 2328 |
20 |
BJ Energy Solutions, LLC (formerly TES Asset Acquisition, LLC) | 196 |
14 |
SNECMA S.A. | 1160 |
13 |
Rohr, Inc. | 653 |
11 |
General Electric Technology GmbH | 1657 |
10 |
Rolls-Royce North American Technologies, Inc. | 1079 |
10 |
Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | 396 |
10 |
Siemens Energy Global GmbH & Co. KG | 2775 |
10 |
Mitsubishi Heavy Industries Compressor Corporation | 613 |
7 |
Kawasaki Jukogyo Kabushiki Kaisha (trading as Kawasaki Heavy Industries, Ltd.) | 2856 |
7 |
Other owners | 232 |