- All sections
- H - Electricity
- H01L - Semiconductor devices not covered by class
- H01L 21/8246 - Read-only memory structures (ROM)
Patent holdings for IPC class H01L 21/8246
Total number of patents in this class: 653
10-year publication summary
|
58
|
33
|
3
|
5
|
5
|
2
|
0
|
4
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NEC Corporation | 34540 |
110 |
| Kabushiki Kaisha Toshiba, doing business as Toshiba Corporation | 6254 |
45 |
| Fujitsu Limited | 18417 |
34 |
| Hitachi, Ltd. | 15247 |
34 |
| Tohoku University | 2689 |
33 |
| Canon Anelva Corporation | 682 |
29 |
| Sony Corporation | 31518 |
27 |
| Tokyo Electron Limited | 12158 |
21 |
| Fujitsu Microelectronics Limited | 139 |
19 |
| Panasonic Corporation | 20307 |
17 |
| ULVAC, Inc. | 1402 |
16 |
| Fuji Electric Holdings Co., Ltd. | 95 |
15 |
| TDK Corporation | 6565 |
14 |
| Japan Science and Technology Agency | 1416 |
13 |
| National Institute of Advanced Industrial Science and Technology | 3736 |
11 |
| Spansion LLC | 357 |
10 |
| Riken | 1687 |
10 |
| Micron Technology, Inc. | 25874 |
8 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 40717 |
7 |
| Renesas Technology Corp. | 134 |
6 |
| Other owners | 174 |