- 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 3/28 - Construction of catalytic reactors
Patent holdings for IPC class F01N 3/28
Total number of patents in this class: 4590
10-year publication summary
|
374
|
400
|
398
|
409
|
402
|
328
|
314
|
245
|
212
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NGK Insulators, Ltd. | 4792 |
219 |
| Cataler Corporation | 563 |
208 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 13086 |
181 |
| Johnson Matthey Public Limited Company | 1852 |
167 |
| Ibiden Co., Ltd. | 1736 |
160 |
| Toyota Motor Corporation | 30455 |
128 |
| Cummins Emission Solutions, Inc. | 517 |
105 |
| BASF Mobile Emissions Catalysts LLC | 257 |
95 |
| Umicore AG & Co. KG | 860 |
94 |
| Honda Motor Co., Ltd. | 24866 |
81 |
| Tenneco (Suzhou) Emission System Co., Ltd. | 135 |
81 |
| Caterpillar Inc. | 9166 |
76 |
| Yanmar Co., Ltd. | 1436 |
75 |
| Purem GmbH, Formerly, Eberspächer Exhaust Technology GmbH | 300 |
75 |
| Tenneco Automotive Operating Company Inc. | 635 |
70 |
| Isuzu Motors Limited | 2240 |
69 |
| Mitsui Mining & Smelting Co., Ltd. | 1426 |
67 |
| 3m Innovative Properties Company | 17957 |
65 |
| Corning Incorporated | 10125 |
65 |
| Faurecia Emissions Control Technologies, USA, LLC | 156 |
65 |
| Other owners | 2444 |