- All sections
- G - Physics
- G11B - Information storage based on relative movement between record carrier and transducer
- G11B 7/2548 - Record carriers characterised by the selection of the material of layers other than recording layers of protective topcoat layers consisting essentially of inorganic materials
Patent holdings for IPC class G11B 7/2548
Total number of patents in this class: 5
10-year publication summary
|
4
|
1
|
0
|
1
|
1
|
0
|
1
|
1
|
0
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sony Corporation | 32931 |
1 |
| Panasonic Corporation | 20786 |
1 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
1 |
| JX Nippon Mining & Metals Corporation | 1576 |
1 |
| Kobe Steel, Ltd. | 912 |
1 |
| Other owners | 0 |