Kei Yasuna
29Patents
5h-index
43Co-inventors
69Inventor score
Filing activity: May 30, 2000 → Mar 27, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6597532B1 | Information recording disk apparatus | Physics | 22 | Expired |
| US6970320B2 | Servo pattern recording method | Physics | 15 | Expired |
| US7085084B2 | Magnetic disk apparatus and servo pattern recording method therefor | Physics | 11 | Expired |
| US6906884B2 | Magnetic disk apparatus and its servo signal recording method | Physics | 8 | Expired |
| US6888696B2 | Magnetic disk apparatus and servo signal recording method | Physics | 6 | Expired |
| US8619379B2 | Patterned media with an alternating series of concentric servo zones and overlap zones | Physics | 5 | Active |
| US8630051B2 | Patterned media with an alternating series of concentric servo zones and overlap zones | Physics | 5 | Active |
| US7646561B2 | Method of writing pattern in disk, method of following track on disk, and apparatus for writing pattern in disk | Physics | 5 | Active |
| US6636385B2 | Magnetic disc apparatus having actuator for head positioning mechanism | Physics | 4 | Expired |
| US11587587B1 | Method to measure thermal protrusion by sensing spacing change due to pre-lasing | Physics | 3 | Active |
| US6999261B2 | Magnetic disk device and servo write method | Physics | 3 | Expired |
| US8625219B2 | Patterned media with an alternating series of concentric servo zones and overlap zones | Physics | 2 | Active |
| US11587586B1 | Determining laser induced thermal protrusion and laser threshold in heat-assisted magnetic recording (HAMR) data storage | Physics | 2 | Active |
| US11830524B1 | Data storage device with split burst servo pattern | Physics | 2 | Active |
| US8531794B2 | Patterned media with an alternating series of concentric servo zones and overlap zones | Physics | 2 | Active |
| US8526132B2 | Servo patterning compatible with planarization of patterned magnetic disks | Physics | 1 | Active |
| US7116509B2 | Magnetic disk apparatus and servo signal recording method | Physics | 1 | Expired |
| US12046265B1 | Data storage device with enhanced management of laser pre-bias and logic block addressing in heat-assisted magnetic recording | Physics | 1 | Active |
| US12100431B1 | Data storage device with symmetric split burst servo pattern | Physics | 1 | Active |
| US8873183B2 | Disk drive and method of writing servo write tracks to a disk | Physics | 1 | Active |
| US8085489B2 | Method for writing servo patterns and disk drive including a controller for writing servo patterns according to the method | Physics | 1 | Active |
| US8670207B2 | Servo pattern compatible with planarization constraints of patterned media and use of a single master template | Physics | 1 | Active |
| US8023220B2 | Method for writing servo data to a disk and disk drive configured to write servo data utilizing the method | Physics | 1 | Active |
| US12347468B2 | Energy-assisted magnetic recording data storage device with opportunistic boosted laser pre-biasing | Physics | 0 | Active |
| US10923146B1 | Data storage device employing triangle-like dither to spread track squeeze | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.