- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01L - Cyclically operating valves for machines or engines
- F01L 3/02 - Selecting particular materials for valve members or valve seats; Valve 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: 250
10-year publication summary
|
35
|
26
|
20
|
28
|
20
|
13
|
12
|
13
|
10
|
4
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nittan Valve Co., Ltd. | 138 |
16 |
| Nissan Motor Co., Ltd. | 12249 |
13 |
| L.E. Jones Company, LLC | 16 |
13 |
| Kabushiki Kaisha Riken | 265 |
12 |
| Nippon Piston Ring Co., Ltd. | 131 |
11 |
| MAHLE International GmbH | 2670 |
10 |
| Honda Motor Co., Ltd. | 24537 |
9 |
| Caterpillar Inc. | 8877 |
9 |
| Bleistahl-Produktions GmbH & Co KG. | 22 |
9 |
| NITTAN Corporation | 50 |
9 |
| Hyundai Motor Company | 19021 |
6 |
| Ibiden Co., Ltd. | 1724 |
6 |
| Fukuda Metal Foil & Powder Co., Ltd. | 66 |
6 |
| TPR Co., Ltd. | 141 |
6 |
| Toyota Motor Corporation | 28582 |
5 |
| Kia Motors Corporation | 7946 |
5 |
| GM Global Technology Operations LLC | 13620 |
4 |
| Federal-Mogul Valvetrain GmbH | 60 |
4 |
| L. E. Jones Company | 11 |
4 |
| Markisches Werk GmbH | 15 |
4 |
| Other owners | 89 |