- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F16D - Couplings for transmitting rotationclutchesbrakes
- F16D 43/21 - Internally controlled automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure with friction members
Patent holdings for IPC class F16D 43/21
Total number of patents in this class: 194
10-year publication summary
|
14
|
18
|
12
|
19
|
20
|
15
|
17
|
18
|
19
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kabushiki Kaisha F.C.C. | 347 |
26 |
| Schaeffler Technologies AG & Co. KG | 9395 |
13 |
| Origin Co., Ltd. | 116 |
9 |
| NSK Ltd. | 2738 |
8 |
| ECA Medical Instruments | 138 |
6 |
| Exedy Corporation | 484 |
5 |
| Litens Automotive Partnership | 331 |
5 |
| Minebea Mitsumi Inc. | 1616 |
5 |
| Hamilton Sundstrand Corporation | 4728 |
4 |
| NTN Corporation | 4976 |
4 |
| Allison Transmission, Inc. | 834 |
4 |
| Magna Closures Inc. | 385 |
4 |
| Origin Electric Company, Limited | 77 |
4 |
| Hornet Acquisitionco, LLC | 59 |
4 |
| Honda Motor Co., Ltd. | 24866 |
3 |
| Rotork Controls Limited | 28 |
3 |
| Robert Bosch GmbH | 41786 |
2 |
| Gates Corporation | 1180 |
2 |
| Guangzhou Panyu Huanan Motors Group Co., Ltd. | 15 |
2 |
| Kesseböhmer Holding KG | 149 |
2 |
| Other owners | 79 |