Yoshitaka Itoh
68Patents
16h-index
42Co-inventors
84Inventor score
Filing activity: Apr 4, 1978 → May 24, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5626409A | Projection-type display apparatus | Electricity | 55 | Expired |
| US6147802A | Polarization luminaire and projection display | Physics | 45 | Expired |
| US4680048A | Method of preparing doped silica glass | Emerging Cross-Sectional Technologies | 37 | Expired |
| US6513953B1 | Illumination system and projector | Physics | 36 | Expired |
| US6529250B1 | Projector | Physics | 35 | Expired |
| US6778228B2 | Projection-type display apparatus | Physics | 31 | Expired |
| US6394607B1 | Polarized light separation device, method of fabricating the same and projection display apparatus using the polarized light separation device | Electricity | 30 | Expired |
| US6208451A | Polarization conversion system, illumination system, and projector | Electricity | 24 | Expired |
| US6042234A | Polarized light illumination device and projection display device | Electricity | 24 | Expired |
| US7119957B2 | Polarization luminaire and projection display | Physics | 24 | Expired |
| US6344927B1 | Polarization luminaire and projection display | Physics | 21 | Expired |
| US6120152A | Projection-type display apparatus | Electricity | 21 | Expired |
| US4680046A | Method of preparing preforms for optical fibers | Emerging Cross-Sectional Technologies | 20 | Expired |
| US6341867B1 | Polarized light illumination device and projector | Electricity | 20 | Expired |
| US6154320A | Polarizing conversion device, polarizing illuminations device, and display apparatus and projector using the devices | Electricity | 19 | Expired |
| US6108132A | Polarized light separating/combining optical element, polarized light illuminating apparatus and projection-type display device | Electricity | 16 | Expired |
| US5986809A | Polarization conversion element, polarization illuminator, display using the same illuminator, and projection type display | Electricity | 16 | Expired |
| US6109752A | Lighting device and projector | Electricity | 15 | Expired |
| US6445500B1 | Polarization luminaire and projection display | Physics | 14 | Expired |
| US6036318A | Projection display | Electricity | 14 | Expired |
| US6309073A | Projector | Electricity | 13 | Expired |
| US6109751A | Projector and lighting optical system therefor | Electricity | 12 | Expired |
| US6411438B1 | Polarization luminaire and projection display | Physics | 12 | Expired |
| US7364305B2 | Projector | Physics | 12 | Expired |
| US6132047A | Polarized light illumination device and projector | Electricity | 11 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.