Electret
US-2026074122-A1 · Mar 12, 2026 · US
Electrets, i.e. having a permanently-polarised dielectric
Electrets, i.e. having a permanently-polarised dielectric · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01G7/02 |
| Official title | Electrets, i.e. having a permanently-polarised dielectric |
| Display label | Electrets, i.e. having a permanently-polarised dielectric |
| Total patents | 60 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 6 |
| 2017 | 7 |
| 2018 | 3 |
| 2019 | 7 |
| 2020 | 3 |
| 2021 | 8 |
| 2022 | 5 |
| 2023 | 4 |
| 2024 | 3 |
| 2025 | 7 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Copolymer and resin composition containing copolymer
US-2026035498-A1 · Feb 5, 2026 · US
Resin composition, and molded product and film using resin composition
US-2026028471-A1 · Jan 29, 2026 · US
Laminated piezoelectric sheet
US-2026019012-A1 · Jan 15, 2026 · US
Electret
US-2025349472-A1 · Nov 13, 2025 · US
Electret material and skin-patch type electret energy harvesting device using same
US-2025336613-A1 · Oct 30, 2025 · US
Electret and electret filter
US-2025256229-A1 · Aug 14, 2025 · US
Structure exhibiting a flexoelectric effect
US-12347629-B2 · Jul 1, 2025 · US
Method for manufacturing electret material
US-2025075310-A1 · Mar 6, 2025 · US
Electrostatic device, electrostatic device intermediate body and production method
US-12215019-B2 · Feb 4, 2025 · US
Power generator having an electret for harvesting energy
US-12191088-B2 · Jan 7, 2025 · US
Power generator
US-12119184-B2 · Oct 15, 2024 · US
Electret Device
US-2024204694-A1 · Jun 20, 2024 · US
Electrostatic motor
US-11863086-B2 · Jan 2, 2024 · US
Structure exhibiting a flexoelectric effect
US-2023386755-A1 · Nov 30, 2023 · US
Electret membrane, preparation method, refrigerator body assembly and refrigeration apparatus
US-2023217965-A1 · Jul 13, 2023 · US
Vibrational Energy Harvester Element
US-2023098623-A1 · Mar 30, 2023 · US
Vibrational energy harvester element
US-11552579-B2 · Jan 10, 2023 · US
Method of manufacturing MEMS vibration element and MEMS vibration element
US-11527968-B2 · Dec 13, 2022 · US
Power generator
US-2022392711-A1 · Dec 8, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01G7/02?
- CPC H01G7/02 is the Cooperative Patent Classification code for “Electrets, i.e. having a permanently-polarised dielectric.”
- How many patents are filed under CPC H01G7/02 (Electrets, i.e. having a permanently-polarised dielectric)?
- Our database includes 60 publications tagged with this CPC code.
- Is patent activity under CPC H01G7/02 growing?
- Publication counts under this code: 3 in 2024 vs 7 in 2025 (latest complete years).