Stirling engine
US-12372043-B2 · Jul 29, 2025 · US
Mechanical Engineering
Mechanical Engineering · 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 | F02G1/047 |
| Official title | — |
| Display label | Mechanical Engineering (mapped technology topic) |
| Total patents | 40 |
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 | 2 |
| 2017 | 1 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 13 |
| 2021 | 8 |
| 2022 | 6 |
| 2023 | 4 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Stirling engine
US-2025043747-A1 · Feb 6, 2025 · US
Constant density heat exchanger and system for energy conversion
US-2023228229-A1 · Jul 20, 2023 · US
Energy conversion apparatus
US-11629663-B2 · Apr 18, 2023 · US
Constant density heat exchanger and system for energy conversion
US-11608795-B2 · Mar 21, 2023 · US
Energy conversion apparatus
US-2023019495-A1 · Jan 19, 2023 · US
Monolithic heat-exchanger bodies
US-2022290630-A1 · Sep 15, 2022 · US
Engine apparatus and method for operation
US-2022195959-A1 · Jun 23, 2022 · US
Monolithic heat-exchanger bodies
US-11346302-B2 · May 31, 2022 · US
Exhaust gas heat recovery system and exhaust system
US-11326498-B2 · May 10, 2022 · US
Energy conversion apparatus
US-11268476-B2 · Mar 8, 2022 · US
Energy conversion apparatus
US-2022034281-A1 · Feb 3, 2022 · US
Constant density heat exchanger and system for energy conversion
US-2021381467-A1 · Dec 9, 2021 · US
Monolithic combustor bodies
US-11181072-B2 · Nov 23, 2021 · US
Energy conversion apparatus
US-11174814-B2 · Nov 16, 2021 · US
Constant density heat exchanger and system for energy conversion
US-11125184-B2 · Sep 21, 2021 · US
Internal combustion engine having an exhaust heat recovery system as well as a method for recovering exhaust heat
US-11035270-B2 · Jun 15, 2021 · US
Monolithic heater bodies
US-11022068-B2 · Jun 1, 2021 · US
Energy conversion apparatus and control system
US-10961949-B2 · Mar 30, 2021 · US
Monolithic heat-exchanger bodies
US-2021062756-A1 · Mar 4, 2021 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02G1/047?
- CPC F02G1/047 is the Cooperative Patent Classification code for “Mechanical Engineering.”
- How many patents are filed under CPC F02G1/047 (Mechanical Engineering)?
- Our database includes 40 publications tagged with this CPC code.
- Is patent activity under CPC F02G1/047 growing?
- Publication counts under this code: 4 in 2023 vs 2 in 2025 (latest complete years).