Takeo Ohta
31Patents
12h-index
32Co-inventors
81Inventor score
Filing activity: Aug 26, 1974 → Jul 10, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3971874A | Optical information storage material and method of making it | Emerging Cross-Sectional Technologies | 64 | Expired |
| US5194363A | Optical recording medium and production process for the medium | Emerging Cross-Sectional Technologies | 39 | Expired |
| US4403318A | Apparatus and method for recording, reproducing and erasing on optical recording discs | Physics | 34 | Expired |
| US5681632A | Optical information recording medium | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4278734A | Optical information recording material and method of recording and reproducing information using same material | Emerging Cross-Sectional Technologies | 26 | Expired |
| US5191565A | Optical information recording medium | Physics | 19 | Expired |
| US5024910A | Optical information recording medium | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5395669A | Optical record medium | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4091171A | Optical information storage material and method of making it | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5147701A | Information recording medium | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4770923A | Protection film structure for functional devices | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4322839A | Method and apparatus for recording and reproducing information on and from an optical disk | Physics | 12 | Expired |
| US5610879A | Optical reproducing device, optical reproducing method using the same, and optical record medium used in the same | Physics | 11 | Expired |
| US5151295A | Process for manufacturing an optical recording medium | Physics | 10 | Expired |
| US4330883A | System and method of optical information storage in a recording disc | Physics | 9 | Expired |
| US5230973A | Method of recording and erasing information in an erasible optical recording medium | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4457794A | Method for manufacturing optical memory disc | Physics | 9 | Expired |
| US4110160A | Fuel assembly spacer within the coolant duct | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5665520A | Optical recording medium | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4852076A | Optical information recording and reproducing disc employing a film having thermally changeable optical characteristics | Physics | 7 | Expired |
| US4547875A | Optical recording and retrieving disc | Physics | 7 | Expired |
| US5439752A | Optical recording medium and reflecting film for use therein | Emerging Cross-Sectional Technologies | 5 | Expired |
| USRE36383E | Optical recording medium and production process for the medium | General | 4 | Expired |
| US5753334A | Optical recording medium | Emerging Cross-Sectional Technologies | 3 | Expired |
| US5674649A | Method of recording information | Emerging Cross-Sectional Technologies | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.