- 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 3/022 - 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 filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
Patent holdings for IPC class F01N 3/022
Total number of patents in this class: 1196
10-year publication summary
98
|
84
|
107
|
84
|
88
|
101
|
82
|
69
|
41
|
17
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
NGK Insulators, Ltd. | 4589 |
175 |
Corning Incorporated | 9932 |
105 |
Ibiden Co., Ltd. | 1724 |
81 |
Johnson Matthey Public Limited Company | 1852 |
52 |
Sumitomo Chemical Company, Limited | 8808 |
48 |
Denso Corporation | 23338 |
46 |
Cataler Corporation | 533 |
45 |
Umicore AG & Co. KG | 867 |
38 |
Robert Bosch GmbH | 40953 |
36 |
BASF Corporation | 2039 |
29 |
Hitachi Metals, Ltd. | 2175 |
29 |
Saint-Gobain Centre de Recherches et d'Etudes Europeen | 475 |
28 |
Honda Motor Co., Ltd. | 24537 |
26 |
Emitec Gesellschaft für Emissionstechnologie mbH | 375 |
22 |
Toyota Motor Corporation | 28582 |
16 |
TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 13301 |
15 |
Hyundai Motor Company | 19021 |
14 |
N.E. Chemcat Corporation | 193 |
12 |
Mitsui Mining & Smelting Co., Ltd. | 1373 |
11 |
MANN+HUMMEL GmbH | 1682 |
10 |
Other owners | 358 |