- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F04D - Non-positive-displacement pumps
- F04D 29/08 - Sealings
Patent holdings for IPC class F04D 29/08
Total number of patents in this class: 959
10-year publication summary
|
109
|
105
|
134
|
126
|
78
|
65
|
85
|
75
|
49
|
17
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 8674 |
77 |
| Mitsubishi Heavy Industries Compressor Corporation | 613 |
34 |
| United Technologies Corporation | 2328 |
26 |
| Safran Aircraft Engines | 5739 |
18 |
| Halliburton Energy Services, Inc. | 20165 |
17 |
| Siemens AG | 24990 |
17 |
| General Electric Company | 18133 |
15 |
| Mitsubishi Heavy Industries, Ltd. | 8217 |
15 |
| Sulzer Management AG | 613 |
15 |
| Grundfos Holding A/S | 506 |
14 |
| Nuovo Pignone Tecnologie S.r.l. | 789 |
13 |
| Baker Hughes Holdings LLC | 3060 |
13 |
| Schlumberger Technology Corporation | 9690 |
12 |
| Nidec Corporation | 2579 |
12 |
| IHI Corporation | 3268 |
11 |
| MTU Aero Engines AG | 622 |
11 |
| Siemens Energy Global GmbH & Co. KG | 2775 |
11 |
| Robert Bosch GmbH | 40953 |
10 |
| Rolls-Royce Corporation | 1686 |
9 |
| GE Infrastructure Technology, LLC | 5873 |
9 |
| Other owners | 600 |