Vehicle driving apparatus
US-12214666-B2 · Feb 4, 2025 · US
Charge admission or combustion-gas discharge
Charge admission or combustion-gas discharge · 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 | F02B53/04 |
| Official title | Charge admission or combustion-gas discharge |
| Display label | Charge admission or combustion-gas discharge |
| Total patents | 49 |
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 | 1 |
| 2016 | 3 |
| 2017 | 10 |
| 2018 | 9 |
| 2019 | 6 |
| 2020 | 7 |
| 2021 | 5 |
| 2022 | 3 |
| 2023 | 2 |
| 2024 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Rotary engine rotor and method
US-12180884-B2 · Dec 31, 2024 · US
Rotary engine rotor and method
US-2024141826-A1 · May 2, 2024 · US
Rotary Pump
US-2023383691-A1 · Nov 30, 2023 · US
Vane drive rotary combustion engine
US-11585221-B1 · Feb 21, 2023 · US
Control apparatus for electric vehicle
US-2022381190-A1 · Dec 1, 2022 · US
Control apparatus for electric vehicle
US-11506134-B1 · Nov 22, 2022 · US
Rotary piston engine
US-11300044-B2 · Apr 12, 2022 · US
Vehicle driving apparatus
US-2021379979-A1 · Dec 9, 2021 · US
Engine assembly with intercooler
US-11187143-B2 · Nov 30, 2021 · US
Rotary internal combustion engine with removable subchamber insert
US-11028768-B2 · Jun 8, 2021 · US
Rotary piston engine
US-2021164387-A1 · Jun 3, 2021 · US
Method of manufacturing a rotary engine casing
US-10995660-B2 · May 4, 2021 · US
Auxiliary power unit with electrically driven compressor
US-10724429-B2 · Jul 28, 2020 · US
Rotary internal combustion engine with removable subchamber insert
US-2020158011-A1 · May 21, 2020 · US
Engine assembly with intercooler
US-2020123964-A1 · Apr 23, 2020 · US
Intake/outlet pipe optimization method for rotary engine
US-10598087-B2 · Mar 24, 2020 · US
Rotary engine casing
US-2020040813-A1 · Feb 6, 2020 · US
Rotary internal combustion engine with removable subchamber insert
US-10544732-B2 · Jan 28, 2020 · US
Engine assembly with intercooler
US-10539065-B2 · Jan 21, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02B53/04?
- CPC F02B53/04 is the Cooperative Patent Classification code for “Charge admission or combustion-gas discharge.”
- How many patents are filed under CPC F02B53/04 (Charge admission or combustion-gas discharge)?
- Our database includes 49 publications tagged with this CPC code.
- Is patent activity under CPC F02B53/04 growing?
- Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).