- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F15B - Systems acting by means of fluids in general; fluid-pressure actuators, e.g. servomotors; details of fluid-pressure systems, not otherwise provided for
- F15B 11/044 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the return line
Patent holdings for IPC class F15B 11/044
Total number of patents in this class: 203
10-year publication summary
|
8
|
17
|
16
|
30
|
19
|
23
|
15
|
21
|
5
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Construction Machinery Co., Ltd. | 2564 |
33 |
| Danfoss A/S | 1316 |
12 |
| Kawasaki Jukogyo Kabushiki Kaisha (trading as Kawasaki Heavy Industries, Ltd.) | 3015 |
10 |
| SMC Corporation | 1358 |
8 |
| Robert Bosch GmbH | 41765 |
7 |
| Caterpillar Inc. | 9158 |
7 |
| KYB Corporation | 1325 |
7 |
| Kawasaki Heavy Industries, Limited | 1585 |
6 |
| Komatsu Ltd. | 4420 |
4 |
| Fisher Controls International LLC | 1515 |
4 |
| Volvo Construction Equipment AB | 1193 |
4 |
| Sun Hydraulics, LLC | 67 |
4 |
| Kabushiki Kaisha Toyota Jidoshokki | 1730 |
4 |
| Toyota Industries Corporation | 1056 |
3 |
| Caterpillar SARL | 468 |
3 |
| HYDAC Fluidtechnik GmbH | 134 |
3 |
| Kobelco Construction Machinery Co., Ltd. | 1075 |
3 |
| Kubota Corporation | 3492 |
3 |
| Pleiger Maschinenbau GmbH & Co. KG | 10 |
3 |
| Sandvik Mining and Construction G.m.b.H. | 88 |
3 |
| Other owners | 72 |