Mitsuyoshi Ichihashi
123Patents
13h-index
97Co-inventors
89Inventor score
Filing activity: Jan 22, 1986 → Dec 16, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6593984B2 | Quarter wave plate comprising two optically anisotropic layers | Physics | 139 | Expired |
| US6338808B1 | Liquid crystal composition comprising liquid crystal molecules and alignment promoter | Chemistry; Metallurgy | 61 | Expired |
| US5943113A | Method of producing a liquid crystal display unit | Physics | 49 | Expired |
| US6400433B1 | Circularly polarizing plate comprising linearly polarizing membrane and quarter wave plate | Physics | 32 | Expired |
| US6589445B2 | LIGHT-REACTION TYPE OPTICALLY ACTIVE COMPOUND, LIGHT-REACTION TYPE CHIRAL AGENT, LIQUID CRYSTAL COMPOSITION, LIQUID CRYSTAL COLOR FILTER, OPTICAL FILM, RECORDING MEDIUM, AND METHOD OF CHANGING TWIST STRUCTURE OF LIQUID CRYSTAL | Chemistry; Metallurgy | 26 | Expired |
| US6875483B2 | Liquid crystal composition comprising liquid crystal molecules and alignment promoter | Physics | 26 | Expired |
| US6686980B1 | Anisotropic film containing a copolymer including a monomer containing a dichroic dye and liquid crystal display containing the antisotropic film | Physics | 22 | Expired |
| US5528392A | Image-forming apparatus having liquid crystal and photoconductive members and using the same light beam for reading and writing | Physics | 22 | Expired |
| US6778237B2 | Polarizing element | Physics | 21 | Expired |
| US4892393A | Ferroelectric liquid crystal composition | Chemistry; Metallurgy | 20 | Expired |
| US4882083A | Smectic liquid crystal mixture | Chemistry; Metallurgy | 18 | Expired |
| US4952335A | Ferroelectric chiral smectic liquid crystal composition | Chemistry; Metallurgy | 15 | Expired |
| US6519016B1 | Phase retarder comprising two optically anisotropic layers | Physics | 14 | Expired |
| US6485798B1 | Optical compensatory sheet comprising substrate and optically anisotropic layer | Chemistry; Metallurgy | 12 | Expired |
| US4882086A | Ferroelectric liquid crystal composition | Chemistry; Metallurgy | 11 | Expired |
| US6519017B1 | Liquid crystal display comprising liquid crystal cell, linearly polarizing membrane, cholesteric liquid crystal layer and quarter wave plate | Physics | 10 | Expired |
| US4966727A | Ferroelectric liquid crystal mixture for guest-host type display elements | Chemistry; Metallurgy | 10 | Expired |
| US5414490A | Photosensitive material exposure apparatus | Physics | 10 | Expired |
| US4826621A | Ferroelectric liquid crystal composition | Chemistry; Metallurgy | 9 | Expired |
| US6337111B1 | Optically anisotropic thin film and process for producing the same | Chemistry; Metallurgy | 9 | Expired |
| US8257611B2 | Optical film and retardation sheet, and liquid crystal compound | Chemistry; Metallurgy | 8 | Active |
| US5108651A | Ferroelectric liquid crystal composition | Chemistry; Metallurgy | 8 | Expired |
| US7755728B2 | Optically anisotropic film, brightness increasing film, laminated optical film, and image display device using the same | Chemistry; Metallurgy | 7 | Active |
| US7658864B2 | Liquid crystal composition, optical compensation film and liquid crystal display device | Physics | 7 | Expired |
| US6219170A | Light modulation device, exposing device and display unit | Physics | 7 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.