System and method for low co emission engine
US-2019264595-A1 · Aug 29, 2019 · US
Apparatus used as intake or exhaust silencer
Apparatus used as intake or exhaust silencer · 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 | F01N13/007 |
| Official title | {Apparatus used as intake or exhaust silencer} |
| Display label | Apparatus used as intake or exhaust silencer |
| Total patents | 168 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 21 |
| 2017 | 16 |
| 2018 | 9 |
| 2019 | 22 |
| 2020 | 24 |
| 2021 | 20 |
| 2022 | 22 |
| 2023 | 19 |
| 2024 | 3 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Muffler
US-2019226371-A1 · Jul 25, 2019 · US
Exhaust system
US-2019195117-A1 · Jun 27, 2019 · US
Exhaust device for internal combustion engine
US-2019085744-A1 · Mar 21, 2019 · US
Engine-driven working machine
US-10224783-B2 · Mar 5, 2019 · US
Exhaust device for internal combustion engine
US-2019055866-A1 · Feb 21, 2019 · US
Exhaust Heat Recovery and Acoustic Valve
US-2018355778-A1 · Dec 13, 2018 · US
Exhaust flow device
US-10086332-B2 · Oct 2, 2018 · US
Exhaust device
US-2018274426-A1 · Sep 27, 2018 · US
Vehicle silencer
US-2018245554-A1 · Aug 30, 2018 · US
Valve Assembly With Anti-Seizing
US-2018224001-A1 · Aug 9, 2018 · US
Connection pipe for connecting an active muffler to an exhaust system for an internal combustion engine
US-9938871-B2 · Apr 10, 2018 · US
Exhaust device of motorcycle
US-2018080364-A1 · Mar 22, 2018 · US
Mobile Selective Catalyst Reduction System
US-2018058292-A1 · Mar 1, 2018 · US
Exhaust muffler and sound deadening element
US-9856766-B2 · Jan 2, 2018 · US
Exhaust gas duct system for an internal combustion engine
US-9822684-B2 · Nov 21, 2017 · US
Power systems and enclosures having improved cooling air flow
US-2017314451-A1 · Nov 2, 2017 · US
Power systems and enclosures having an improved compressor drive
US-2017314561-A1 · Nov 2, 2017 · US
Engine-driven working machine
US-2017271942-A1 · Sep 21, 2017 · US
Hermetic compressor comprising a suction acoustic filter
US-9732741-B2 · Aug 15, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01N13/007?
- CPC F01N13/007 is the Cooperative Patent Classification code for “Apparatus used as intake or exhaust silencer.”
- How many patents are filed under CPC F01N13/007 (Apparatus used as intake or exhaust silencer)?
- Our database includes 168 publications tagged with this CPC code.
- Is patent activity under CPC F01N13/007 growing?
- Publication counts under this code: 3 in 2024 vs 3 in 2025 (latest complete years).