- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F01L - Cyclically operating valves for machines or engines
- F01L 3/02 - Selecting particular materials for valve members or valve seatsValve members or valve seats composed of two or more materials
Patent holdings for IPC class F01L 3/02
Total number of patents in this class: 260
10-year publication summary
|
20
|
28
|
20
|
13
|
13
|
13
|
10
|
11
|
4
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nittan Valve Co., Ltd. | 129 |
15 |
| Nissan Motor Co., Ltd. | 13028 |
14 |
| L.E. Jones Company, LLC | 21 |
14 |
| Nippon Piston Ring Co., Ltd. | 140 |
13 |
| Kabushiki Kaisha Riken | 306 |
12 |
| MAHLE International GmbH | 2919 |
11 |
| Caterpillar Inc. | 10302 |
10 |
| NITTAN Corporation | 56 |
10 |
| Bleistahl-Produktions GmbH & Co KG. | 19 |
8 |
| Fukuda Metal Foil & Powder Co., Ltd. | 91 |
8 |
| TPR Co., Ltd. | 172 |
8 |
| Honda Motor Co., Ltd. | 26212 |
6 |
| Hyundai Motor Company | 24898 |
6 |
| Ibiden Co., Ltd. | 1681 |
6 |
| Kia Motors Corporation | 7715 |
5 |
| Toyota Motor Corporation | 36092 |
4 |
| GM Global Technology Operations LLC | 16219 |
4 |
| Federal-Mogul Valvetrain GmbH | 62 |
4 |
| L. E. Jones Company | 10 |
4 |
| NGK Insulators, Ltd. | 5172 |
3 |
| Other owners | 95 |