Masato Isogai
25Patents
14h-index
85Co-inventors
84Inventor score
Filing activity: May 6, 1981 → Nov 29, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4576732A | Ferroelectric liquid crystal compounds and liquid crystal compositions | Chemistry; Metallurgy | 112 | Expired |
| US4508429A | Method for driving liquid crystal element employing ferroelectric liquid crystal | Physics | 84 | Expired |
| US5064520A | Method and apparatus for forming a film | Chemistry; Metallurgy | 57 | Expired |
| US5194973A | Liquid crystal display device and display apparatus using same | Physics | 52 | Expired |
| US4586791A | Optical modulation element with surface parallel and unidirectional alignment of LC | Physics | 45 | Expired |
| US4634226A | Optical apparatus using ferroelectric liquid crystal and switching unit for emitted light | Physics | 35 | Expired |
| US4591886A | Driving method and apparatus for optical printer with liquid-crystal switching element | Physics | 34 | Expired |
| US7495415B2 | DC backup power supply system | Emerging Cross-Sectional Technologies | 27 | Expired |
| US7157810B2 | Backup power supply | Electricity | 27 | Expired |
| US8353374B2 | Battery module, battery device, electric motor drive system and vehicle | Emerging Cross-Sectional Technologies | 26 | Active |
| US6977448B2 | Backup power supply | Electricity | 20 | Expired |
| US6430066B2 | Electric power system having series connected capacitor | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4759614A | Ferroelectric liquid crystal element with particular alignment film and a method for manufacturing the same | Chemistry; Metallurgy | 18 | Expired |
| US7245469B2 | DC backup power supply device and method for diagnosing the same | Electricity | 15 | Expired |
| US4836657A | Optical change-over switch utilizing ferroelectric liquid crystal material | Physics | 13 | Expired |
| US4400059A | Liquid crystal display device | Physics | 10 | Expired |
| US5176854A | Non-linear optical device | Chemistry; Metallurgy | 7 | Expired |
| US5101411A | Organic non-linear optical device | Electricity | 6 | Expired |
| US8947023B2 | Battery control device and motor drive system | Emerging Cross-Sectional Technologies | 4 | Active |
| USRE33120E | Method for driving liquid crystal element employing ferroelectric liquid crystal | General | 2 | Expired |
| US5313293A | Dot-matrix type display device | Physics | 2 | Expired |
| US6593031B1 | Nickel metal-hydride cell | Emerging Cross-Sectional Technologies | 2 | Expired |
| US5898607A | Recording/reproducing method and recording/reproducing apparatus | Physics | 1 | Expired |
| US12173169B2 | Water-based ink, printed recording medium, inkjet recording method, inkjet recording device, and ink storage container | Chemistry; Metallurgy | 0 | Active |
| US12134703B2 | Water-based ink, printed recording medium, inkjet recording method, inkjet recording device, and ink storage container | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.