Energy storage and conversion in linear generators
US-12473855-B2 · Nov 18, 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 | F02B71/00 |
| Official title | — |
| Display label | Mechanical Engineering (mapped technology topic) |
| Total patents | 60 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 3 |
| 2018 | 2 |
| 2019 | 6 |
| 2020 | 13 |
| 2021 | 5 |
| 2022 | 11 |
| 2023 | 7 |
| 2024 | 7 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
High-efficiency linear generator
US-12421890-B2 · Sep 23, 2025 · US
Control of piston trajectory in a linear generator
US-12209548-B2 · Jan 28, 2025 · US
High-efficiency linear generator
US-2024287930-A1 · Aug 29, 2024 · US
Energy storage and conversion in linear generators
US-2024240586-A1 · Jul 18, 2024 · US
High-efficiency linear generator
US-12000331-B2 · Jun 4, 2024 · US
Control of piston trajectory in a linear generator
US-2024125281-A1 · Apr 18, 2024 · US
Open-faced piston assembly
US-11946435-B2 · Apr 2, 2024 · US
Opposed, free-piston engine
US-11879338-B2 · Jan 23, 2024 · US
Energy storage and conversion in linear generators
US-11867116-B2 · Jan 9, 2024 · US
Free piston generator based on rigid synchronous transmission system
US-11831225-B2 · Nov 28, 2023 · US
Control of piston trajectory in a linear generator
US-11739705-B2 · Aug 29, 2023 · US
Energy storage and conversion in linear generators
US-2023193817-A1 · Jun 22, 2023 · US
Opposed, free-piston engine
US-2023098581-A1 · Mar 30, 2023 · US
High-efficiency linear generator
US-2023101969-A1 · Mar 30, 2023 · US
Free piston generator based on split thermodynamic cycle
US-11616420-B2 · Mar 28, 2023 · US
Energy storage and conversion in linear generators
US-11578646-B2 · Feb 14, 2023 · US
High-efficiency linear generator
US-11525391-B2 · Dec 13, 2022 · US
Control of piston trajectory in a linear generator
US-2022381192-A1 · Dec 1, 2022 · US
Energy storage and conversion in linear generators
US-2022364502-A1 · Nov 17, 2022 · US
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02B71/00?
- CPC F02B71/00 is the Cooperative Patent Classification code for “Mechanical Engineering.”
- How many patents are filed under CPC F02B71/00 (Mechanical Engineering)?
- Our database includes 60 publications tagged with this CPC code.
- Is patent activity under CPC F02B71/00 growing?
- Publication counts under this code: 7 in 2024 vs 3 in 2025 (latest complete years).