- 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: 206
10-year publication summary
|
13
|
14
|
10
|
7
|
17
|
5
|
9
|
9
|
13
|
3
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Denso Corporation | 25676 |
12 |
| Sekisui Chemical Co., Ltd. | 3638 |
12 |
| Saginomiya Seisakusho, Inc. | 229 |
11 |
| Tokyo University of Science Foundation | 445 |
10 |
| Asahi Glass Company, Limited | 2605 |
9 |
| The University of Tokyo | 4380 |
9 |
| Yupo Corporation | 247 |
9 |
| a School Corporation Kansai University | 91 |
7 |
| Nippon Valqua Industries, Ltd. | 68 |
5 |
| National University Corporation Shizuoka University | 383 |
4 |
| Ricoh Company, Ltd. | 13334 |
3 |
| Shinko Electric Industries Co., Ltd. | 1241 |
3 |
| Central Research Institute of Electric Power Industry | 88 |
3 |
| The School Corporation Kansai University | 178 |
3 |
| The Regents of the University of California | 20842 |
2 |
| Centre National de La Recherche Scientifique | 11077 |
2 |
| Panasonic Corporation | 18809 |
2 |
| FUJIFILM Corporation | 30628 |
2 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 48629 |
2 |
| Murata Manufacturing Co., Ltd. | 25847 |
2 |
| Other owners | 94 |