Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6221561 | Diffusion plate and method for manufacturing master die thereof | Hiroshi Kuboya, Toshiharu Takahashi, Moriyasu Shirayanagi, Koichi Maruyama, Teruaki Hiyamuta +1 more | 2001-04-24 |
| 5965327 | Method for manufacturing a master die for a diffusion plate and diffusion manufactured by said method | Hiroshi Kuboya, Toshiharu Takahashi, Moriyasu Shirayanagi, Koichi Maruyama, Teruaki Hiyamuta +1 more | 1999-10-12 |
| 5733710 | Method for manufacturing a master die for a diffusion plate and diffusion plate manufactured by said method | Hiroshi Kuboya, Toshiharu Takahashi, Moriyasu Shirayanagi, Koichi Maruyama, Teruaki Hiyamuta +1 more | 1998-03-31 |
| 5491587 | Collimating lens for optical system using semiconductor laser | Makoto Iwaki, Koichi Maruyama | 1996-02-13 |
| 5434835 | Optical disk apparatus | Hisashi Konno, Suguru Takishima, Takashi Morita, Toshiyuki Kase, Masahiro Oono +2 more | 1995-07-18 |
| 5402269 | Compound prism | Masahiro Oono, Koichi Maruyama, Masato Noguchi, Hitoshi Kimura, Masahiko Sasaki | 1995-03-28 |
| 5379105 | Roof surface measuring apparatus | Hirofumi Matsuo, Masahiro Oono, Masato Noguchi | 1995-01-03 |
| 5373437 | Device for and method of reducing cross talk in optical disk device | Tsuyoshi Itoh, Isao Okuda, Hiroshi Nishikawa, Toshiyuki Kase, Ryota Ogawa +2 more | 1994-12-13 |
| 5343332 | Apparatus for adjusting optical axis including a beam shaping prism | Masahiro Oono, Koichi Maruyama, Hitoshi Kimura, Masahiko Sasaki | 1994-08-30 |
| 5341246 | Apparatus for adjusting an optical axis including plates on opposite sides of a beam shaping prism | Masahiro Oono, Koichi Maruyama, Hitoshi Kimura, Masahiko Sasaki | 1994-08-23 |
| 5297114 | Magneto-optic recording/reproduction apparatus for minimizing variation in focusing error signals caused by variation in optical source wavelength | Tsuyoshi Itoh, Isao Okuda, Toshiyuki Kase, Hiroshi Nishikawa, Ryoto Ogawa +3 more | 1994-03-22 |
| 5280464 | Optical disk apparatus having a focusing error correcting system | Tsuyoshi Itoh, Isao Okuda, Toshiyuki Kase, Hiroshi Nishikawa, Ryota Ogawa +2 more | 1994-01-18 |
| 5237457 | Apparatus for adjusting an optical axis including a laser beam source and a beam shaping prism | Masahiro Oono, Koichi Maruyama, Hitoshi Kimura, Masahiko Sasaki | 1993-08-17 |
| 5223983 | Compound prism including interfaces with curvatures of the order of a laser wave length | Masahiro Oono, Koichi Maruyama, Masato Noguchi, Hitoshi Kimura, Masahiko Sasaki | 1993-06-29 |
| 5000573 | Method of alignment with the use of diffraction gratings and an apparatus therefor | Masanori Suzuki, Atsunobu Une | 1991-03-19 |
| 4656347 | Diffraction grating position adjuster using a grating and a reflector | Atsunobu Une, Nobuyuki Takeuchi, Kimiyoshi Deguchi | 1987-04-07 |