- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 25/20 - Lubricating arrangements using lubrication pumps
Patent holdings for IPC class F01D 25/20
Total number of patents in this class: 381
10-year publication summary
|
32
|
49
|
42
|
46
|
46
|
40
|
33
|
22
|
27
|
1
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 8674 |
104 |
| Safran Aircraft Engines | 5739 |
48 |
| Pratt & Whitney Canada Corp. | 4215 |
35 |
| Rolls-Royce PLC | 2944 |
26 |
| Rolls-Royce Deutschland Ltd & Co KG | 765 |
22 |
| General Electric Company | 18133 |
16 |
| United Technologies Corporation | 2328 |
16 |
| Rolls-Royce Corporation | 1686 |
12 |
| Hamilton Sundstrand Corporation | 4525 |
10 |
| Safran Aero Boosters SA | 180 |
7 |
| Safran Helicopter Engines | 676 |
5 |
| Honeywell International Inc. | 13799 |
4 |
| Safran Transmission Systems | 260 |
4 |
| GE Infrastructure Technology, LLC | 5873 |
4 |
| Snecma | 1065 |
4 |
| Honda Motor Co., Ltd. | 24537 |
3 |
| Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | 699 |
3 |
| SNECMA S.A. | 1160 |
2 |
| The Boeing Company | 19843 |
2 |
| Toshiba Corporation | 12017 |
2 |
| Other owners | 52 |