Quieted front exhaust motor
US-12496699-B2 · Dec 16, 2025 · US
characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
characterised by changing the positions of the inlet or outlet openings with respect to the working chamber · 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 | F01C20/10 |
| Official title | characterised by changing the positions of the inlet or outlet openings with respect to the working chamber |
| Display label | characterised by changing the positions of the inlet or outlet openings with respect to the working chamber |
| Total patents | 32 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 2 |
| 2017 | 7 |
| 2018 | 8 |
| 2019 | 2 |
| 2020 | 5 |
| 2021 | 1 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Quieted front exhaust motor
US-2024351180-A1 · Oct 24, 2024 · US
Compound engine system with rotary engine
US-11187146-B2 · Nov 30, 2021 · US
Rotary internal combustion engine with pilot subchamber
US-10697365-B2 · Jun 30, 2020 · US
Compound engine system with rotary engine
US-2020123971-A1 · Apr 23, 2020 · US
Rotary internal combustion engine with pilot subchamber
US-10578012-B2 · Mar 3, 2020 · US
Rotary internal combustion engine with pilot subchamber
US-10557407-B2 · Feb 11, 2020 · US
Compound engine system with rotary engine
US-10544733-B2 · Jan 28, 2020 · US
Scroll expander
US-10301940-B2 · May 28, 2019 · US
Rotary internal combustion engine with pilot subchamber
US-2019055882-A1 · Feb 21, 2019 · US
Rotary internal combustion engine
US-10138804-B2 · Nov 27, 2018 · US
Rotary internal combustion engine with pilot subchamber
US-10125676-B2 · Nov 13, 2018 · US
Screw compressor having a volume ratio being adjusted by end faces extending along from a low-pressure side end wall to discharge edges of a slider
US-10030653-B2 · Jul 24, 2018 · US
Rotary internal combustion engine with pilot subchamber
US-2018187593-A1 · Jul 5, 2018 · US
Rotary internal combustion engine with pilot subchamber
US-10006358-B2 · Jun 26, 2018 · US
Rotary internal combustion engine with exhaust purge
US-9926842-B2 · Mar 27, 2018 · US
Rotary internal combustion engine with pilot subchamber
US-2018080371-A1 · Mar 22, 2018 · US
Rotary internal combustion engine
US-2018045110-A1 · Feb 15, 2018 · US
Rotary internal combustion engine with variable volumetric compression ratio
US-9828906-B2 · Nov 28, 2017 · US
Compound engine system with rotary engine
US-2017335762-A1 · Nov 23, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01C20/10?
- CPC F01C20/10 is the Cooperative Patent Classification code for “characterised by changing the positions of the inlet or outlet openings with respect to the working chamber.”
- How many patents are filed under CPC F01C20/10 (characterised by changing the positions of the inlet or outlet openings with respect to the working chamber)?
- Our database includes 32 publications tagged with this CPC code.
- Is patent activity under CPC F01C20/10 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).