- 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: 199
10-year publication summary
|
9
|
8
|
17
|
16
|
30
|
19
|
23
|
15
|
17
|
2
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Construction Machinery Co., Ltd. | 2498 |
32 |
| Danfoss A/S | 1259 |
12 |
| Kawasaki Jukogyo Kabushiki Kaisha (trading as Kawasaki Heavy Industries, Ltd.) | 2856 |
10 |
| SMC Corporation | 1354 |
8 |
| Robert Bosch GmbH | 40953 |
7 |
| Caterpillar Inc. | 8877 |
7 |
| KYB Corporation | 1278 |
7 |
| Kawasaki Heavy Industries, Limited | 1524 |
6 |
| Fisher Controls International LLC | 1520 |
4 |
| Sun Hydraulics, LLC | 67 |
4 |
| Kabushiki Kaisha Toyota Jidoshokki | 1699 |
4 |
| Komatsu Ltd. | 4265 |
3 |
| Toyota Industries Corporation | 1010 |
3 |
| HYDAC Fluidtechnik GmbH | 130 |
3 |
| Kobe Steel, Ltd. | 912 |
3 |
| Kobelco Construction Machinery Co., Ltd. | 1048 |
3 |
| Kubota Corporation | 3054 |
3 |
| Pleiger Maschinenbau GmbH & Co. KG | 10 |
3 |
| Sandvik Mining and Construction G.m.b.H. | 85 |
3 |
| Shin Caterpillar Mitsubishi Ltd. | 51 |
3 |
| Other owners | 71 |