Daisuke Ogata
37Patents
7h-index
50Co-inventors
72Inventor score
Filing activity: Oct 5, 1990 → Sep 11, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6532202B1 | Optical element, optical head and optical recording reproducing apparatus | Physics | 21 | Expired |
| US6480454B1 | Optical element, optical head using the optical element, and optical recording and reproducing apparatus using the optical element | Physics | 21 | Expired |
| US5099352A | Reflector oscillating apparatus | Physics | 17 | Expired |
| US6934226B2 | Optical disk apparatus | Physics | 15 | Expired |
| US7158450B2 | Optical element, optical head, optical recording reproducing apparatus and optical recording/reproducing method | Physics | 12 | Expired |
| US5490128A | Optical head having a light source adjusting mechanism and a method for adjusting a light source in an optical head | Physics | 9 | Expired |
| US6661415B1 | Liquid crystal driver and optical head for tilt correction | Physics | 9 | Expired |
| US6798723B2 | Optical pickup head and information recording/reproducing device | Physics | 7 | Expired |
| US5671209A | Focusing time period and power control of a multilaser diode array | Electricity | 7 | Expired |
| US7177101B2 | Optical head apparatus and optical information recording and reproduction apparatus | Physics | 5 | Expired |
| US7407373B2 | Internal gear pump and an inner rotor of such a pump | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6987598B2 | Optical element, optical head, optical recording reproducing apparatus and optical recording/reproducing method | Physics | 3 | Expired |
| US7065013B2 | Optical disk apparatus | Physics | 3 | Expired |
| US6890164B2 | Internal gear pump | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6781945B2 | Optical head and optical disc apparatus for focusing a collimated laser beam | Physics | 2 | Expired |
| US6862740B2 | Optical information recording medium, optical information recording/reproduction method, and optical information recording/reproduction apparatus | Physics | 2 | Expired |
| US5526330A | Optical head assembly for optical information player | Physics | 2 | Expired |
| US7113472B2 | Optical head including an active polymer film for switching voltage during recording and reproducing processes | Physics | 1 | Expired |
| US7602561B2 | Optical head apparatus and optical information recording and reproduction apparatus | Physics | 1 | Active |
| US6292441A | Optical head device, optical information apparatus, and method for detecting focus error signal | Physics | 1 | Expired |
| US7034980B2 | Optical element, optical head, optical recording reproducing apparatus and optical recording/ reproducing method | Physics | 1 | Expired |
| US7031247B2 | Liquid crystal driver and optical head for tilt correction | Physics | 1 | Expired |
| US7170664B2 | Optical element, optical head, optical recording reproducing apparatus and optical recording/reproducing method | Physics | 1 | Expired |
| US7151737B2 | Optical head and optical disc apparatus for focusing a collimated laser beam | Physics | 1 | Expired |
| US8794798B2 | White film and surface light source using same | Physics | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.