- All sections
- H - Electricity
- H01G - Capacitorscapacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices of the electrolytic type
- H01G 7/02 - Electrets, i.e. having a permanently-polarised dielectric
Patent holdings for IPC class H01G 7/02
Total number of patents in this class: 198
10-year publication summary
|
8
|
13
|
14
|
10
|
7
|
17
|
5
|
9
|
9
|
8
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sekisui Chemical Co., Ltd. | 3386 |
12 |
| Saginomiya Seisakusho, Inc. | 213 |
11 |
| Denso Corporation | 24259 |
9 |
| Asahi Glass Company, Limited | 2792 |
9 |
| Yupo Corporation | 232 |
9 |
| Tokyo University of Science Foundation | 391 |
8 |
| The University of Tokyo | 4173 |
8 |
| a School Corporation Kansai University | 92 |
7 |
| Nippon Valqua Industries, Ltd. | 75 |
5 |
| National University Corporation Shizuoka University | 391 |
4 |
| Ricoh Company, Ltd. | 13242 |
3 |
| Omron Corporation | 7260 |
3 |
| Shinko Electric Industries Co., Ltd. | 1207 |
3 |
| Central Research Institute of Electric Power Industry | 102 |
3 |
| The School Corporation Kansai University | 168 |
3 |
| Toyobo Co., Ltd. | 2490 |
3 |
| The Regents of the University of California | 19898 |
2 |
| Centre National de La Recherche Scientifique | 10421 |
2 |
| Panasonic Corporation | 20124 |
2 |
| FUJIFILM Corporation | 29350 |
2 |
| Other owners | 90 |