- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F15B - Systems acting by means of fluids in generalfluid-pressure actuators, e.g. servomotorsdetails of fluid-pressure systems, not otherwise provided for
- F15B 21/08 - Servomotor systems incorporating electrically- operated control means
Patent holdings for IPC class F15B 21/08
Total number of patents in this class: 608
10-year publication summary
|
30
|
25
|
51
|
48
|
37
|
45
|
41
|
53
|
30
|
28
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Caterpillar Inc. | 9768 |
53 |
| Deere & Company | 7758 |
26 |
| Volvo Construction Equipment AB | 1213 |
21 |
| Robert Bosch GmbH | 43063 |
20 |
| Hitachi Construction Machinery Co., Ltd. | 2686 |
18 |
| Fisher Controls International LLC | 1504 |
15 |
| Danfoss A/S | 1362 |
13 |
| Festo SE & Co. KG | 400 |
13 |
| Samson Aktiengesellschaft | 277 |
9 |
| Zoomlion Heavy Industry Science and Technology Co., Ltd. | 387 |
9 |
| Komatsu Ltd. | 4621 |
8 |
| AGCO International GmbH | 625 |
8 |
| Kawasaki Heavy Industries, Limited | 1647 |
7 |
| Caterpillar SARL | 480 |
7 |
| Parker-Hannifin Corporation | 1002 |
7 |
| Dresser LLC | 281 |
7 |
| HD Hyundai Infracore Co., Ltd | 284 |
7 |
| Illinois Tool Works Inc. | 11554 |
6 |
| Eaton Corporation | 1812 |
6 |
| Woodward, Inc. | 659 |
6 |
| Other owners | 342 |