- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F01N - Gas-flow silencers or exhaust apparatus for machines or engines in generalgas-flow silencers or exhaust apparatus for internal-combustion engines
- F01N 3/28 - Construction of catalytic reactors
Patent holdings for IPC class F01N 3/28
Total number of patents in this class: 4606
10-year publication summary
|
374
|
400
|
398
|
409
|
402
|
328
|
315
|
247
|
215
|
95
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NGK Insulators, Ltd. | 4965 |
219 |
| Cataler Corporation | 573 |
213 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 12790 |
173 |
| Johnson Matthey Public Limited Company | 1862 |
171 |
| Ibiden Co., Ltd. | 1711 |
144 |
| Toyota Motor Corporation | 32331 |
130 |
| Cummins Emission Solutions, Inc. | 541 |
115 |
| BASF Mobile Emissions Catalysts LLC | 404 |
100 |
| Umicore AG & Co. KG | 854 |
95 |
| Honda Motor Co., Ltd. | 25301 |
81 |
| Tenneco (Suzhou) Emission System Co., Ltd. | 135 |
81 |
| Caterpillar Inc. | 9558 |
76 |
| Vitesco Technologies GmbH | 2604 |
76 |
| Purem GmbH, Formerly, Eberspächer Exhaust Technology GmbH | 307 |
76 |
| Yanmar Co., Ltd. | 1404 |
74 |
| Mitsui Mining & Smelting Co., Ltd. | 1489 |
71 |
| Tenneco Automotive Operating Company Inc. | 622 |
70 |
| Corning Incorporated | 10268 |
67 |
| Faurecia Emissions Control Technologies, USA, LLC | 157 |
65 |
| 3m Innovative Properties Company | 17819 |
64 |
| Other owners | 2445 |