Multi-stage stirling cycle machine and a steady-state operating parameter control method therefor
US-11795890-B2 · Oct 24, 2023 · US
having at least two working members, e.g. pistons, delivering power output
having at least two working members, e.g. pistons, delivering power output · 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 | F02G1/044 |
| Official title | having at least two working members, e.g. pistons, delivering power output |
| Display label | having at least two working members, e.g. pistons, delivering power output |
| Total patents | 67 |
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 |
| 2016 | 5 |
| 2017 | 2 |
| 2018 | 5 |
| 2019 | 5 |
| 2020 | 16 |
| 2021 | 8 |
| 2022 | 10 |
| 2023 | 8 |
| 2024 | 4 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Constant density heat exchanger and system for energy conversion
US-2023228229-A1 · Jul 20, 2023 · US
Stirling engine
US-2023142663-A1 · May 11, 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
Engine apparatus and method for operation
US-11566582-B2 · Jan 31, 2023 · US
Energy conversion apparatus
US-2023019495-A1 · Jan 19, 2023 · US
Stirling-cycle cooling device with monobloc support
US-11473815-B2 · Oct 18, 2022 · US
Monolithic heat-exchanger bodies
US-2022290630-A1 · Sep 15, 2022 · US
System and apparatus for energy conversion
US-2022213847-A1 · Jul 7, 2022 · US
Engine apparatus and method for operation
US-2022195959-A1 · Jun 23, 2022 · US
Pressure boost system
US-2022186679-A1 · Jun 16, 2022 · US
Monolithic heat-exchanger bodies
US-11346302-B2 · May 31, 2022 · US
Engine apparatus and method for operation
US-2022074367-A1 · Mar 10, 2022 · US
Energy conversion apparatus
US-11268476-B2 · Mar 8, 2022 · US
Beta-type stirling machine
US-2022065193-A1 · Mar 3, 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
Engine apparatus and method for operation
US-11193449-B2 · Dec 7, 2021 · US
Monolithic combustor bodies
US-11181072-B2 · Nov 23, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02G1/044?
- CPC F02G1/044 is the Cooperative Patent Classification code for “having at least two working members, e.g. pistons, delivering power output.”
- How many patents are filed under CPC F02G1/044 (having at least two working members, e.g. pistons, delivering power output)?
- Our database includes 67 publications tagged with this CPC code.
- Is patent activity under CPC F02G1/044 growing?
- Publication counts under this code: 4 in 2024 vs 2 in 2025 (latest complete years).