Exhaust handling systems for marine vessels and related methods
US-2025360999-A1 · Nov 27, 2025 · US
for adjusting resonance or dead chambers or passages to resonance or dead chambers
for adjusting resonance or dead chambers or passages to resonance or dead chambers · 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 | F01N1/161 |
| Official title | {for adjusting resonance or dead chambers or passages to resonance or dead chambers} |
| Display label | for adjusting resonance or dead chambers or passages to resonance or dead chambers |
| Total patents | 32 |
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 | 1 |
| 2017 | 6 |
| 2018 | 2 |
| 2019 | 7 |
| 2020 | 3 |
| 2021 | 3 |
| 2022 | 1 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Exhaust handling systems for marine vessels and related methods
US-12384508-B2 · Aug 12, 2025 · US
Dual Mode Muffler
US-2025067201-A1 · Feb 27, 2025 · US
Exhaust handling systems for marine vessels and related methods
US-2024286726-A1 · Aug 29, 2024 · US
Exhaust handling systems for marine vessels and related methods
US-12043361-B1 · Jul 23, 2024 · US
Exhaust restriction device for improved sensor signal
US-11746685-B2 · Sep 5, 2023 · US
Exhaust restriction device for improved sensor signal
US-2023235690-A1 · Jul 27, 2023 · US
Device for controlling exhaust sound of vehicle
US-11578627-B2 · Feb 14, 2023 · US
Multi-mode exhaust muffler
US-11492937-B2 · Nov 8, 2022 · US
Tunable resonator
US-11092078-B2 · Aug 17, 2021 · US
Exhaust valve damper
US-11060428-B2 · Jul 13, 2021 · US
Multi-mode exhaust muffler
US-2021148262-A1 · May 20, 2021 · US
Exhaust system sound generation assembly unit
US-10825442-B2 · Nov 3, 2020 · US
Device for controlling exhaust sound of vehicle
US-2020332687-A1 · Oct 22, 2020 · US
Active helmholtz resonator with actuated membrane
US-2020265822-A1 · Aug 20, 2020 · US
Exhaust Valve Damper
US-2019360374-A1 · Nov 28, 2019 · US
Exhaust gas system for an internal combustion engine
US-10458298-B2 · Oct 29, 2019 · US
Exhaust gas aftertreatment device and exhaust gas aftertreatment method
US-10450911-B2 · Oct 22, 2019 · US
Noise suppression apparatus and fan module using the same
US-10408230-B2 · Sep 10, 2019 · US
Slip-type active noise control muffler and method for controlling the same
US-10364715-B2 · Jul 30, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01N1/161?
- CPC F01N1/161 is the Cooperative Patent Classification code for “for adjusting resonance or dead chambers or passages to resonance or dead chambers.”
- How many patents are filed under CPC F01N1/161 (for adjusting resonance or dead chambers or passages to resonance or dead chambers)?
- Our database includes 32 publications tagged with this CPC code.
- Is patent activity under CPC F01N1/161 growing?
- Publication counts under this code: 2 in 2024 vs 3 in 2025 (latest complete years).