- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01N - Gas-flow silencers or exhaust apparatus for machines or engines in general; gas-flow silencers or exhaust apparatus for internal-combustion engines
- F01N 3/04 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of liquids
Patent holdings for IPC class F01N 3/04
Total number of patents in this class: 530
10-year publication summary
|
49
|
58
|
45
|
54
|
50
|
60
|
36
|
35
|
28
|
5
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Fuji Electric Co., Ltd. | 4750 |
22 |
| Yamaha Motor Co., Ltd. | 2740 |
20 |
| Brunswick Corporation | 1271 |
16 |
| Wartsila Finland Oy | 740 |
16 |
| Toyota Motor Corporation | 28582 |
12 |
| Caterpillar Inc. | 8877 |
12 |
| Alfa Laval Corporate AB | 1265 |
12 |
| Ford Global Technologies, LLC | 19702 |
9 |
| Yara Marine Technologies AS | 19 |
9 |
| Japan Engine Corporation | 72 |
8 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 13301 |
8 |
| Mitsubishi Heavy Industries, Ltd. | 8217 |
6 |
| GM Global Technology Operations LLC | 13620 |
6 |
| Hyundai Motor Company | 19021 |
6 |
| Emitec Gesellschaft für Emissionstechnologie mbH | 375 |
6 |
| MAHLE International GmbH | 2670 |
6 |
| Tecogen Inc. | 37 |
6 |
| Tenneco GmbH | 117 |
6 |
| Valeo Systemes Thermiques | 2471 |
6 |
| Daewoo Shipbuilding & Marine | 6 |
6 |
| Other owners | 332 |