Masahide Yatsu
26Patents
8h-index
22Co-inventors
71Inventor score
Filing activity: Sep 14, 1995 → Jun 23, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6002544A | Head positioning control system for use in a disk drive using different target velocity data for read and write seeks | Physics | 221 | Expired |
| US6738215B2 | Method and system for accurate self-servo writing by using relative position between head and writing surface | Physics | 27 | Expired |
| US6417983B1 | System for head positioning control in a disk drive | Physics | 16 | Expired |
| US7675705B2 | Method and apparatus for writing servo pattern using spiral pattern in disk drive | Physics | 14 | Active |
| US5754358A | Head positioning system and method for use in disk recording/reproducing apparatus | Physics | 11 | Expired |
| US6943977B2 | Method and apparatus for servo writing in a disk drive | Physics | 10 | Expired |
| US7312946B2 | Method and apparatus for servo control in a disk drive | Physics | 10 | Expired |
| US7477472B2 | Method and apparatus for writing servo data in a disk drive using spiral servo patterns | Physics | 9 | Active |
| US5680271A | Control device of the disk apparatus for positioning a head on a disk | Physics | 8 | Expired |
| US5801897A | Head positioning control system for use in a disk storage system | Physics | 7 | Expired |
| US6175465A | Head positioning control system for use in a disk storage drive | Physics | 6 | Expired |
| US7423835B2 | Method and apparatus for servo control using spiral servo information in a disk drive | Physics | 5 | Active |
| US7489468B2 | Method and apparatus for head positioning control in a disk drive | Physics | 5 | Active |
| US6771455B1 | Control system and control method for positioning a head above a desired position on disk | Physics | 5 | Expired |
| US7855850B2 | Method and apparatus for head positioning using spiral servo patterns in a disk drive | Physics | 4 | Active |
| US7630161B2 | Method and apparatus for writing spiral servo pattern in a disk drive | Physics | 4 | Active |
| US7710682B2 | Method and apparatus for writing spiral servo pattern in a disk drive | Physics | 4 | Active |
| US7239472B2 | Method and apparatus for writing data in a disk drive | Physics | 3 | Expired |
| US7457074B2 | Method and apparatus for correcting errors while writing spiral servo information in a disk drive | Physics | 3 | Active |
| US7221533B2 | Method and apparatus for servo information writing in a disk drive | Physics | 2 | Expired |
| US7804659B2 | Method and apparatus for positioning head using spiral servo pattern in a disk drive | Physics | 1 | Active |
| US7106545B2 | Method and apparatus for servowriting in a disk drive | Physics | 1 | Expired |
| US8300351B2 | Magnetic recording apparatus | Physics | 0 | Active |
| US8315008B2 | Magnetic disk device and head position control method | Physics | 0 | Active |
| US7538965B2 | Method and apparatus for writing servo management information in a disk drive | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.