High-power core system
US-2024297553-A1 · Sep 5, 2024 · US
structurally associated with free piston engines
structurally associated with free piston engines · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02K7/1884 |
| Official title | {structurally associated with free piston engines} |
| Display label | structurally associated with free piston engines |
| Total patents | 74 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 2 |
| 2018 | 4 |
| 2019 | 2 |
| 2020 | 10 |
| 2021 | 5 |
| 2022 | 15 |
| 2023 | 14 |
| 2024 | 8 |
| 2025 | 9 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Energy storage and conversion in linear generators
US-2024240586-A1 · Jul 18, 2024 · US
Electric vehicle with energy recovery system
US-12040689-B2 · Jul 16, 2024 · US
Integrated linear generator system
US-12027956-B2 · Jul 2, 2024 · US
Core synchronization for linear generators
US-2024113644-A1 · Apr 4, 2024 · US
Energy storage and conversion in linear generators
US-11867116-B2 · Jan 9, 2024 · US
Adaptive linear linked piston electric power generator
US-11846230-B2 · Dec 19, 2023 · US
Adaptive linear linked piston electric power generator
US-11840957-B2 · Dec 12, 2023 · US
Free piston generator based on rigid synchronous transmission system
US-11831225-B2 · Nov 28, 2023 · US
Pumpjack having linear alternator
US-11828139-B2 · Nov 28, 2023 · US
Adaptive linear linked piston electric power generator
US-11815004-B2 · Nov 14, 2023 · US
Integrated linear generator system
US-11750065-B2 · Sep 5, 2023 · US
Auto-braking for an electromagnetic machine
US-2023246576-A1 · Aug 3, 2023 · US
Linear electromagnetic machine system
US-2023198367-A1 · Jun 22, 2023 · US
Energy storage and conversion in linear generators
US-2023193817-A1 · Jun 22, 2023 · US
Auto-braking for an electromagnetic machine
US-11652432-B2 · May 16, 2023 · US
Free piston generator based on split thermodynamic cycle
US-11616420-B2 · Mar 28, 2023 · US
Linear electromagnetic machine system
US-11616428-B2 · Mar 28, 2023 · US
Energy storage and conversion in linear generators
US-11578646-B2 · Feb 14, 2023 · US
Systems and methods for flexure-based bearing mounting
US-2023034504-A1 · Feb 2, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02K7/1884?
- CPC H02K7/1884 is the Cooperative Patent Classification code for “structurally associated with free piston engines.”
- How many patents are filed under CPC H02K7/1884 (structurally associated with free piston engines)?
- Our database includes 74 publications tagged with this CPC code.
- Is patent activity under CPC H02K7/1884 growing?
- Publication counts under this code: 8 in 2024 vs 9 in 2025 (latest complete years).