Engine system
US-2025290443-A1 · Sep 18, 2025 · US
relating to valves
relating to valves · 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 | F02B77/082 |
| Official title | {relating to valves} |
| Display label | relating to valves |
| Total patents | 46 |
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 | 4 |
| 2018 | 9 |
| 2019 | 6 |
| 2020 | 10 |
| 2021 | 6 |
| 2022 | 3 |
| 2023 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Air pressure limiting valve diagnostic systems and methods
US-2025273022-A1 · Aug 28, 2025 · US
Method and system for identifying abnormal valve performance in an internal combustion engine
US-11566569-B1 · Jan 31, 2023 · US
Methods and systems for diagnosing non-deactivated valves of disabled engine cylinders
US-11560859-B1 · Jan 24, 2023 · US
Hybrid vehicle and method of diagnosing abnormal condition of hybrid vehicle
US-11514730-B2 · Nov 29, 2022 · US
Method for operating an internal combustion engine, control device, and internal combustion engine
US-11441480-B2 · Sep 13, 2022 · US
System and method for engine valve lash calibration
US-11268411-B2 · Mar 8, 2022 · US
System and method for engine valve lash calibration
US-2021381401-A1 · Dec 9, 2021 · US
Method and system for estimating damage in an internal combustion engine
US-11028772-B1 · Jun 8, 2021 · US
Methods and systems for an active exhaust valve
US-11002166-B2 · May 11, 2021 · US
Method and system for wear estimation
US-2021123376-A1 · Apr 29, 2021 · US
Method and system for wear estimation
US-10968823-B1 · Apr 6, 2021 · US
Method for operating an internal combustion engine, control device, and internal combustion engine
US-2021003071-A1 · Jan 7, 2021 · US
Methods and systems for an active exhaust valve
US-2020362735-A1 · Nov 19, 2020 · US
System and method for waste-gate valve diagnostics
US-10823092-B2 · Nov 3, 2020 · US
Method and system for variable displacement engines
US-10823093-B2 · Nov 3, 2020 · US
Method and system for variable displacement engines
US-2020309051-A1 · Oct 1, 2020 · US
Hybrid vehicle and method of diagnosing abnormal condition of hybrid vehicle
US-2020294332-A1 · Sep 17, 2020 · US
Systems and methods for cylinder exhaust valve diagnostics
US-10760517-B2 · Sep 1, 2020 · US
System and method for waste-gate valve diagnostics
US-2020240334-A1 · Jul 30, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02B77/082?
- CPC F02B77/082 is the Cooperative Patent Classification code for “relating to valves.”
- How many patents are filed under CPC F02B77/082 (relating to valves)?
- Our database includes 46 publications tagged with this CPC code.
- Is patent activity under CPC F02B77/082 growing?
- Publication counts under this code: 2 in 2023 vs 2 in 2025 (latest complete years).