Straddle-Type Vehicle
US-2021394856-A1 · Dec 23, 2021 · US
by passing the exhaust gases through porous members
by passing the exhaust gases through porous members · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F01N1/082 |
| Official title | {by passing the exhaust gases through porous members} |
| Display label | by passing the exhaust gases through porous members |
| Total patents | 115 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 5 |
| 2017 | 9 |
| 2018 | 5 |
| 2019 | 19 |
| 2020 | 11 |
| 2021 | 12 |
| 2022 | 20 |
| 2023 | 15 |
| 2024 | 7 |
| 2025 | 10 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Exhaust gas treatment system and method with four-way catalyzed filter element
US-11187127-B2 · Nov 30, 2021 · US
Muffler
US-11181031-B2 · Nov 23, 2021 · US
Exhaust system noise reduction device of vehicle
US-2021355850-A1 · Nov 18, 2021 · US
Insert assembly unit for a muffler of an exhaust system of an internal combustion engine
US-2021317763-A1 · Oct 14, 2021 · US
Muffler for an exhaust system of an internal combustion engine
US-11143070-B2 · Oct 12, 2021 · US
Exhaust muffler
US-2021301693-A1 · Sep 30, 2021 · US
Exhaust valve damper
US-11060428-B2 · Jul 13, 2021 · US
Muffler for vehicle for implementing sporty exhaust sound
US-2021131323-A1 · May 6, 2021 · US
Vehicle muffler
US-10895181-B2 · Jan 19, 2021 · US
Exhaust gas treatment system and method with four-way catalyzed filter element
US-2020408121-A1 · Dec 31, 2020 · US
Exhaust sound attenuation device
US-2020386132-A1 · Dec 10, 2020 · US
Exhaust fluid collision type muffler
US-2020318523-A1 · Oct 8, 2020 · US
Muffler with easy discharge of condensate
US-10787948-B2 · Sep 29, 2020 · US
Muffler
US-2020240300-A1 · Jul 30, 2020 · US
Apparatus for regulating pressure of exhaust gas of fuel cell system
US-2020185745-A1 · Jun 11, 2020 · US
Exhaust tube and tuning tube assembly with whistle reduction feature
US-10634024-B2 · Apr 28, 2020 · US
Drone elimination muffler
US-2020123946-A1 · Apr 23, 2020 · US
Muffler structure of saddle-type vehicle
US-2020123947-A1 · Apr 23, 2020 · US
Silencer for an exhaust gas system of a motor vehicle and motor vehicle with a silencer
US-2020088077-A1 · Mar 19, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01N1/082?
- CPC F01N1/082 is the Cooperative Patent Classification code for “by passing the exhaust gases through porous members.”
- How many patents are filed under CPC F01N1/082 (by passing the exhaust gases through porous members)?
- Our database includes 115 publications tagged with this CPC code.
- Is patent activity under CPC F01N1/082 growing?
- Publication counts under this code: 7 in 2024 vs 10 in 2025 (latest complete years).