- 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: 195
10-year publication summary
|
4
|
0
|
2
|
4
|
0
|
1
|
4
|
0
|
1
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Kayaku Kabushiki Kaisha | 1400 |
20 |
| Panasonic Corporation | 20786 |
18 |
| Matsushita Electric Industrial Co., Ltd. | 4724 |
17 |
| Sony Corporation | 32931 |
13 |
| Ricoh Company, Ltd. | 13266 |
13 |
| DIC Corporation | 3597 |
12 |
| Mitsubishi Kagaku Media Co., Ltd. | 42 |
11 |
| FUJIFILM Corporation | 27102 |
10 |
| Lintec Corporation | 1915 |
5 |
| Bayer MaterialScience AG | 874 |
4 |
| Pioneer Corporation | 4843 |
4 |
| Mitsubishi Chemical Corporation | 4313 |
4 |
| Covestro Deutschland AG | 2429 |
4 |
| JX Nippon Mining & Metals Corporation | 1576 |
4 |
| Nippon Mining & Metals Co., Ltd. | 161 |
4 |
| NEC Corporation | 32703 |
3 |
| Hewlett-Packard Development Company, L.P. | 28538 |
3 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
3 |
| Mitsubishi Materials Corporation | 2378 |
3 |
| Mitsubishi Plastics, Inc. | 347 |
3 |
| Other owners | 37 |