- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01L - Cyclically operating valves for machines or engines
- F01L 3/08 - Valve guides; Sealing of valve stem, e.g. sealing by lubricant
Patent holdings for IPC class F01L 3/08
Total number of patents in this class: 161
10-year publication summary
|
14
|
22
|
22
|
16
|
15
|
15
|
13
|
12
|
7
|
1
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NOK Corporation | 2108 |
16 |
| Volvo Truck Corporation | 2764 |
8 |
| Eaton Intelligent Power Limited | 6113 |
8 |
| Caterpillar Inc. | 8877 |
7 |
| Bleistahl-Produktions GmbH & Co KG. | 22 |
7 |
| Freudenberg Sealing Technologies S.A.S. di Externa Italia S.r.l.u | 19 |
7 |
| Dana Automotive Systems Group, LLC | 395 |
6 |
| Ford Global Technologies, LLC | 19702 |
4 |
| Aktiebolaget SKF | 2700 |
4 |
| MAHLE International GmbH | 2670 |
4 |
| Mitsubishi Heavy Industries, Ltd. | 8217 |
3 |
| Nissan Motor Co., Ltd. | 12249 |
3 |
| TPR Co., Ltd. | 141 |
3 |
| AI Alpine US Bidco Inc. | 107 |
3 |
| Resonac Corporation | 2233 |
3 |
| Honda Motor Co., Ltd. | 24537 |
2 |
| GM Global Technology Operations LLC | 13620 |
2 |
| Hyundai Motor Company | 19021 |
2 |
| Daikin Industries, Ltd. | 9495 |
2 |
| Schaeffler Technologies AG & Co. KG | 8880 |
2 |
| Other owners | 65 |