- All sections
- G - Physics
- G11B - Information storage based on relative movement between record carrier and transducer
- G11B 21/21 - Supporting the headsSupporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier with provision for maintaining desired spacing of head from record carrier, e.g. fluid-dynamic spacing, slider
Patent holdings for IPC class G11B 21/21
Total number of patents in this class: 209
10-year publication summary
|
6
|
3
|
5
|
7
|
4
|
6
|
2
|
3
|
7
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JPMorgan Chase Bank, National Association | 8971 |
26 |
| Toshiba Storage Device Corporation | 55 |
21 |
| NHK Spring Co., Ltd. | 1994 |
20 |
| Seagate Technology LLC | 3962 |
12 |
| Fujitsu Limited | 16859 |
11 |
| Toshiba Corporation | 12625 |
10 |
| Hitachi, Ltd. | 16183 |
9 |
| SAE Magnetics (H.K.) Ltd. | 311 |
9 |
| Magnecomp Corporation | 199 |
9 |
| TDK Corporation | 6927 |
8 |
| Nitto Denko Corporation | 8565 |
8 |
| Dai Nippon Printing Co., Ltd. | 4254 |
7 |
| Toshiba Electronic Devices & Storage Corporation | 2358 |
7 |
| Hitachi Metals, Ltd. | 1824 |
5 |
| Hutchinson Technology Incorporated | 305 |
5 |
| Headway Technologies, Inc. | 680 |
4 |
| L2 Drive Inc. | 9 |
4 |
| LSI Corporation | 154 |
3 |
| Kyocera Corporation | 14433 |
3 |
| Western Digital Technologies, Inc. | 1902 |
3 |
| Other owners | 25 |