- All sections
- G - Physics
- G11B - Information storage based on relative movement between record carrier and transducer
- G11B 23/03 - Containers for flat record carriers
Patent holdings for IPC class G11B 23/03
Total number of patents in this class: 177
10-year publication summary
|
8
|
3
|
8
|
9
|
15
|
13
|
10
|
6
|
4
|
5
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sony Corporation | 32931 |
19 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
16 |
| Panasonic Corporation | 20786 |
13 |
| International Business Machines Corporation | 60644 |
8 |
| Hoya Corporation | 2822 |
7 |
| Quantum Corporation | 332 |
5 |
| FUJIFILM Corporation | 27102 |
4 |
| Sony Semiconductor Solutions Corporation | 8770 |
4 |
| Seagate Technology LLC | 4228 |
3 |
| TDK Corporation | 6306 |
3 |
| EMC IP Holding Company LLC | 11079 |
3 |
| MeadWestvaco Corporation | 370 |
3 |
| Sony Computer Entertainment Inc. | 1177 |
2 |
| Warner Bros. Home Entertainment Inc. | 9 |
2 |
| Matsushita Electric Industrial Co., Ltd. | 4724 |
2 |
| Hitachi Consumer Electronics Co., Ltd. | 300 |
2 |
| Oracle America, Inc. | 3928 |
2 |
| Disc Graphics Inc. | 10 |
2 |
| Nidec Corporation | 2579 |
2 |
| Trade Guys International Pty Ltd. | 2 |
2 |
| Other owners | 73 |