- All sections
- G - Physics
- G11B - Information storage based on relative movement between record carrier and transducer
- G11B 7/254 - Record carriers characterised by the selection of the material of layers other than recording layers of protective topcoat layers
Patent holdings for IPC class G11B 7/254
Total number of patents in this class: 112
10-year publication summary
|
2
|
4
|
0
|
1
|
4
|
0
|
1
|
0
|
0
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Panasonic Corporation | 18658 |
17 |
| Nippon Kayaku Kabushiki Kaisha | 1474 |
14 |
| Sony Corporation | 30029 |
10 |
| DIC Corporation | 4000 |
9 |
| Mitsubishi Kagaku Media Co., Ltd. | 14 |
5 |
| Bayer MaterialScience AG | 700 |
4 |
| FUJIFILM Corporation | 30774 |
4 |
| Mitsubishi Chemical Corporation | 4757 |
4 |
| Covestro Deutschland AG | 2862 |
4 |
| JX Nippon Mining & Metals Corporation | 1454 |
4 |
| Lintec Corporation | 2046 |
4 |
| Hewlett-Packard Development Company, L.P. | 25121 |
3 |
| Pioneer Corporation | 3740 |
3 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2844 |
3 |
| Taiyo Yuden Co., Ltd. | 2061 |
3 |
| NEC Corporation | 37491 |
2 |
| Ricoh Company, Ltd. | 13407 |
2 |
| Mitsubishi Materials Corporation | 2482 |
2 |
| Mitsubishi Plastics, Inc. | 298 |
2 |
| Nippon Shokubai Co., Ltd. | 1529 |
2 |
| Other owners | 11 |