- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F15C - Fluid-circuit elements predominantly used for computing or control purposes
- F15C 3/02 - Circuit elements having moving parts using spool valves
Patent holdings for IPC class F15C 3/02
Total number of patents in this class: 49
10-year publication summary
|
2
|
2
|
3
|
1
|
3
|
1
|
4
|
3
|
4
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Allison Transmission, Inc. | 833 |
6 |
| Volvo Construction Equipment AB | 1172 |
6 |
| The Boeing Company | 19843 |
2 |
| Emerson Process Management Power & Water Solutions, Inc. | 126 |
2 |
| Goodrich Actuation Systems SAS | 134 |
2 |
| Gestion Josera Inc. | 2 |
2 |
| Placements Chic Inc. | 2 |
2 |
| Halliburton Energy Services, Inc. | 20165 |
1 |
| Pratt & Whitney Canada Corp. | 4215 |
1 |
| Hamilton Sundstrand Corporation | 4525 |
1 |
| Toyota Industries Corporation | 1010 |
1 |
| Alamo Group Inc. | 207 |
1 |
| American Axle & Manufacturing, Inc. | 649 |
1 |
| Amsted Rail - Faiveley, LLC. | 1 |
1 |
| Bell Helicopter Textron Inc. | 1122 |
1 |
| Clark Equipment Company | 335 |
1 |
| Festo AG & Co. KG | 313 |
1 |
| Fisher Controls International LLC | 1520 |
1 |
| Flextronics AP, LLC | 476 |
1 |
| Hacker, Richard | 1 |
1 |
| Other owners | 14 |