Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5459712 | Optical disk and optical disk apparatus where information is recorded having a specific track pitch and as a plurality of pit trains, each including a plurality of substantially trapezoidal pits | Yoshinori Honguh | 1995-10-17 |
| 5278712 | Removable disk drive having two heads formed with a gimbal structure | — | 1994-01-11 |
| 5250796 | Noise reduction system for optical record and reproduction apparatus using auto-power controlled semiconductor laser device | Toyoki Taguchi, Hisashi Yamada, Kei Shimura | 1993-10-05 |
| 5021898 | Head positioning control method and apparatus | Yuji Sakai | 1991-06-04 |
| 5012372 | Head access mechanism for moving heads | Akihiro Isomura | 1991-04-30 |
| 4964009 | Magnetic disk having an index area and a limited number of radially extending servo sections | Kazunori Moriya, Nobuyuki Takagi, Norio Nakamura | 1990-10-16 |
| 4896240 | Magnetic disk having an index area and a limited number of radially extending servo sections | Kazunori Moriya, Nobuyuki Takagi, Norio Nakamura | 1990-01-23 |
| 4851933 | Magnetic disk apparatus having magnetic head with pre-erase gap | Yuji Sakai, Takehito Yamada | 1989-07-25 |
| 4745503 | Linear actuator for moving a recording/reading head in an access direction relative to a recording disc | Takao Muraoka | 1988-05-17 |
| 4737869 | Magnetic disk having data area and index servo area and servo system for positioning read/write head on magnetic disk | Nobuyuki Takagi, Norio Nakamura, Kazunori Moriya | 1988-04-12 |
| 4636885 | Servo system for a magnetic disk memory having spiral tracks | Takehito Yamada | 1987-01-13 |
| 4631606 | System for detecting the position of a read-write head on a disk recording medium having servo sectors with three or more servo patterns | — | 1986-12-23 |
| 4499511 | System for detecting position of a read-write head in seek operation on a disk memory having data servo spectors | — | 1985-02-12 |