Hideki Hayashi
344Patents
23h-index
355Co-inventors
93Inventor score
Filing activity: Sep 17, 1975 → Nov 16, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6239851A | Planar light source device having polarization separator formed of two sheets with mating triangular prisms and different indices of refraction | Physics | 186 | Expired |
| US5703856A | Optical head and optical data recording and reproducing apparatus having the same | Physics | 78 | Expired |
| US5541871A | Nonvolatile ferroelectric-semiconductor memory | Physics | 63 | Expired |
| USD394505S | Non-contact eye-pressure measuring apparatus | General | 54 | Expired |
| US4602295A | Recording and reproducing method for video format signal | Electricity | 52 | Expired |
| USD697834S1 | Motor vehicle and/or toy replica thereof | General | 45 | Active |
| US5796711A | Optical disc having plural zones of recording tracks | Physics | 44 | Expired |
| US5754512A | Correction elements to lower light intensity around an optical axis of an optical head with a plurality of focal points | Physics | 43 | Expired |
| US5967996A | Apparatus and method for aiding transmission | Human Necessities | 40 | Expired |
| US5684773A | Information reproduction apparatus compatible with different recording media | Physics | 40 | Expired |
| USD697492S1 | Electronic device | General | 39 | Active |
| US5790492A | Crosstalk canceler with digital filter for producing pseudo crosstalk component | Physics | 35 | Expired |
| USD462984S1 | Image forming apparatus | General | 34 | Expired |
| US6995909B1 | Lens, optical head, optical information writing/reading apparatus and optical information recording medium writing/reading method | Physics | 32 | Expired |
| USD491117S1 | Front grille for an automobile | General | 31 | Expired |
| US5745457A | Optical disk player with coarse and fine speed control | Physics | 30 | Expired |
| US5633821A | Nonvolatile memory device | Physics | 30 | Expired |
| US4863646A | Method of producing fine particles of thermoplastic resin | Chemistry; Metallurgy | 30 | Expired |
| US6445627B1 | Semiconductor integrated circuit | Physics | 29 | Expired |
| US4859618A | Method of producing the gate electrode of a field effect transistor | Electricity | 27 | Expired |
| US5440532A | Digital signal reproducing apparatus for reproducing digital signals from a recording medium | Physics | 23 | Expired |
| US5592409A | Nonvolatile memory | Physics | 23 | Expired |
| US5912868A | Optical head for reproducing data from first and second optical disks | Physics | 23 | Expired |
| US6304538A | Information reproducing apparatus for reproducing digital information on record medium | Physics | 22 | Expired |
| US5901128A | Recorded information reproducing apparatus | Physics | 22 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.