- 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 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: 214
10-year publication summary
|
8
|
16
|
16
|
29
|
19
|
22
|
14
|
21
|
12
|
8
|
| 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. | 2680 |
38 |
| Danfoss A/S | 1354 |
12 |
| Kawasaki Jukogyo Kabushiki Kaisha (trading as Kawasaki Heavy Industries, Ltd.) | 3088 |
11 |
| SMC Corporation | 1367 |
8 |
| Robert Bosch GmbH | 42887 |
7 |
| KYB Corporation | 1386 |
7 |
| Komatsu Ltd. | 4607 |
6 |
| Kawasaki Heavy Industries, Limited | 1637 |
6 |
| Caterpillar Inc. | 9673 |
5 |
| Eagle Industry Co., Ltd. | 1141 |
4 |
| Fisher Controls International LLC | 1506 |
4 |
| Volvo Construction Equipment AB | 1203 |
4 |
| Sun Hydraulics, LLC | 67 |
4 |
| Kabushiki Kaisha Toyota Jidoshokki | 1782 |
4 |
| Toyota Industries Corporation | 1145 |
3 |
| Caterpillar SARL | 480 |
3 |
| HYDAC Fluidtechnik GmbH | 138 |
3 |
| Kobelco Construction Machinery Co., Ltd. | 1159 |
3 |
| Kubota Corporation | 4035 |
3 |
| Pleiger Maschinenbau GmbH & Co. KG | 10 |
3 |
| Other owners | 76 |