Issued Patents All Time
Showing 1–25 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7986606 | Optical head device | Nobuhiko Takeshita, Kara Yoshida | 2011-07-26 |
| 7738346 | Polarizing diffraction element and optical head device | Yoshiharu Ooi, Hiromasa Sato | 2010-06-15 |
| 7534370 | Polymerizable liquid crystal composition, optical anisotropic material, optical element and optical head device | Kara Yoshida, Nobuhiko Takeshita, Yuzuru Tanabe, Hiroki Hotaka, Hiromasa Sato | 2009-05-19 |
| RE38305 | LCD device including an illumination device having a polarized light separating sheet between a light guide and the display | Yoshiharu Ooi, Masao Ozeki, Hiroaki Ito, Hiroshi Hasebe, Tetsuro Matsumoto +1 more | 2003-11-11 |
| 6562259 | Acrylic acid derivative compounds and polymeric liquid crystal obtained by polymerizing the same | Mitsuru Kurosawa, Kouichi Murata | 2003-05-13 |
| 6304312 | Optical head, method of manufacturing the same, and diffraction element suitable therefor | Yuzuru Tanabe, Hiromasa Sato, Hiroki Hotaka | 2001-10-16 |
| RE37377 | LCD device including an illumination device having a polarized light separating sheet between a light guide and the display | Yoshiharu Ooi, Masao Ozeki, Hiroaki Ito, Hiroshi Hasebe, Tetsuro Matsumoto +1 more | 2001-09-18 |
| 6271966 | Optical head device including an optically anisotropic diffraction grating and process for its production | Yuzuru Tanabe, Hiromasa Sato, Hiroki Hotaka | 2001-08-07 |
| 6180028 | Liquid-crystal composition and polymeric liquid crystal obtained by polymerizing the same | Hiroki Hotaka, Mitsuru Kurosawa, Hiromasa Sato, Yuzuru Tanabe | 2001-01-30 |
| 6122021 | Liquid crystal display element and a projection type liquid crystal display apparatus | Yoshinori Hirai, Satoshi Niiyama, Masanori Yuki, Masaya Kunigita, Yukio Yoshikawa +1 more | 2000-09-19 |
| 6118586 | Optical head device including an optically anisotropic diffraction grating and production method thereof | Yuzuru Tanabe, Hiromasa Sato, Hiroki Hotaka | 2000-09-12 |
| 6018378 | Liquid crystal/polymer composite with high optical anisotropy and low dielectric anisotropy to lower hysteresis exhibiting transparent and light scattering states | Yoshinori Hirai, Satoshi Niiyama, Masanori Yuki, Masaya Kunigita, Yukio Yoshikawa +1 more | 2000-01-25 |
| 5587816 | LCD device including an illumination device having a polarized light separating sheet between a light guide and the display | Yoshiharu Ooi, Masao Ozeki, Hiroaki Ito, Hiroshi Hasebe, Tetsuro Matsumoto +1 more | 1996-12-24 |
| 5386306 | Active matrix liquid crystal display element and projection type active matrix liquid crystal display device | Masanori Yuki, Masaya Kunigita, Yoshinori Hirai, Yukio Yoshikawa, Eiji Shidoji | 1995-01-31 |
| 5379137 | Liquid crystal display element and a projection type liquid crystal display apparatus | Yoshinori Hirai, Satoshi Niiyama | 1995-01-03 |
| 5274480 | Projection type display apparatus having an aperture stop means including non-circular openings | Yoshinori Hirai, Yoshiharu Ooi | 1993-12-28 |
| 5264953 | Liquid crystal display apparatus for providing a gray scale and a projection type liquid crystal display apparatus | Yoshinori Hirai, Masaya Kunigita | 1993-11-23 |
| 5245449 | Polymer dispersed liquid crystal color projection display apparatus | Yoshiharu Ooi | 1993-09-14 |
| 5235445 | Liquid crystal optical element with liquid crystal in polymer matrix with particular modulus of elasticity | Yoshinori Hirai, Satoshi Niiyama, Hiroshi Kumai | 1993-08-10 |
| 5216531 | Projection type active matrix polymer dispersed liquid crystal display apparatus with particles of liquid crystal material randomly oriented | Yoshinori Hirai, Satoshi Niiyama, Yoshiharu Ooi | 1993-06-01 |
| 5206746 | Transparent-scattering type optical device including a prism with a triangular longitudinal cross section | Yoshiharu Ooi, Yoshinori Hirai | 1993-04-27 |
| 5196952 | Liquid crystal display element and a projection type liquid crystal display apparatus | Yoshinori Hirai, Satoshi Niiyama | 1993-03-23 |
| 5162934 | Method of manufacturing liquid crystal display element | Hiroshi Kumai, Satoshi Niiyama | 1992-11-10 |
| 5103327 | Active matrix liquid crystal display element and a projection type active matrix liquid crystal display apparatus | Yoshinori Hirai, Satoshi Niiyama, Hiroshi Kumai | 1992-04-07 |
| 4834509 | Liquid crystal optical device and process for its production and method for its operation | Hiroshi Kumai, Shoichi Tsuchiya, Kaoriko Masuda | 1989-05-30 |