Hitoshi Okada
40Patents
11h-index
51Co-inventors
78Inventor score
Filing activity: Mar 29, 1977 → Jun 28, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5530336A | Battery protection circuit | Electricity | 84 | Expired |
| US4338683A | Videodisc player with constant turntable velocity | Physics | 50 | Expired |
| US6632274B2 | Ultrafine particle dispersion composition, composition for interlayer for laminated glass, interlayer and laminated glass | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4227224A | Cassette tape recording/reproducing apparatus | Physics | 15 | Expired |
| US5083212A | Apparatus and method for recording a color television signal on an optical disc | Electricity | 14 | Expired |
| US4899951A | Braking mechanism for use in a magnetic recording apparatus | Physics | 13 | Expired |
| US4785362A | Driving force branching gear mechanism | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4118736A | Method of and apparatus for controlling the optical reading of recorded information | Physics | 12 | Expired |
| US4747089A | Method and apparatus for focusing servo control | Physics | 12 | Expired |
| US4964589A | Mode changing mechanism for a tape player | Physics | 12 | Expired |
| US4586096A | Cassette loading/ejecting device | Physics | 12 | Expired |
| US4972337A | Device for controlling rotation of a magnet used in a magneto-optical recording system | Physics | 11 | Expired |
| US4310912A | Servo system for recording and/or reproducing apparatus using a rotatable recording carrier | Physics | 11 | Expired |
| US4224647A | Magnetic tape-record/playback apparatus | Physics | 10 | Expired |
| US4403265A | Power loading/unloading mechanism for tape record/playback apparatus | Physics | 9 | Expired |
| US4423445A | Clutch system in a tape player | Physics | 9 | Expired |
| US5168487A | Optical recording and/or reproducing apparatus | Physics | 9 | Expired |
| US4479155A | Auto-loading mechanism in a magnetic recording/reproducing apparatus | Physics | 8 | Expired |
| US6264907A | Process for producing silica particles suitable for use as filler for paper | Textiles; Paper | 7 | Expired |
| US4511940A | Tape player having motor-driven tape-pack loading mechanism | Physics | 6 | Expired |
| US4209812A | Tape player | Physics | 5 | Expired |
| US6413373B1 | Process for producing silica particles suitable for use as filler for paper | Textiles; Paper | 5 | Expired |
| US4992652A | Focus error detecting circuit for disk player | Physics | 5 | Expired |
| US5031056A | Tape tension mechanism | Physics | 5 | Expired |
| US4430680A | Reciprocating member control mechanism in tape player | Physics | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.