Issued Patents All Time
Showing 26–50 of 68 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5726962 | Compact optical pickup device with beam splitter | Kuniaki Okada, Kohji Minami, Hiroyuki Yamamoto, Yoshio Yoshida | 1998-03-10 |
| 5652737 | Magneto-optical disk pick-up device having mode splitter using cut off effect caused by tapered waveguide | Kohji Minami, Kuniaki Okada, Hiroyuki Yamamoto, Yoshio Yoshida, Keiji Sakai | 1997-07-29 |
| 5652816 | Optical coupler and method for producing the same | Kohji Minami, Kuniaki Okada, Hiroyuki Yamamoto, Yoshio Yoshida | 1997-07-29 |
| 5576149 | Method for producing a tapered waveguide | Hiroyuki Yamamoto, Keiji Sakai, Yoshio Yoshida, Kuniaki Okada, Kouji Minami | 1996-11-19 |
| RE35332 | Optical pickup device with diffraction device | Toshiya Nagahama, Yoshio Yoshida, Yasuo Nakata | 1996-09-24 |
| 5515354 | Optical pickup | Takahiro Miyake, Yoshio Yoshida | 1996-05-07 |
| 5509094 | Mode splitter and a magneto-optical disk pick-up device having the mode splitter | Kohji Minami, Kuniaki Okada, Hiroyuki Yamamoto, Yoshio Yoshida, Keiji Sakai | 1996-04-16 |
| 5502457 | Fiber optic face plate for a seamless modular display | Keiji Sakai, Hiroyuki Yamamoto | 1996-03-26 |
| 5483508 | Optical recording and reproducing apparatus using a hologram to detect and judge a plurality of pit patterns | Takahiro Miyake, Tetsuo Ueyama, Toshiyuki Tanaka | 1996-01-09 |
| 5473470 | Polarization detector | Takahiro Miyake, Yoshio Yoshida, Yasuo Nakata | 1995-12-05 |
| 5465315 | Display apparatus having a plurality of display devices | Keiji Sakai, Yoshio Yoshida, Hiroyuki Yamamoto, Yasuo Nakata, Takahiro Miyake | 1995-11-07 |
| 5446719 | Optical information reproducing apparatus | Yoshio Yoshida, Shigeki Tsuji | 1995-08-29 |
| 5440427 | Optical pick-up device having an optical diffraction grating element | Takahiro Miyake, Yoshio Yoshida | 1995-08-08 |
| 5428595 | Optical information recording and reproducing device | Yoshio Yoshida, Hideaki Sato, Hiroyuki Yamamoto, Nobuo Ogata, Katsuhiro Kubo | 1995-06-27 |
| 5428472 | Optical scan device having an optical diffraction grating element | Takahiro Miyake, Yoshio Yoshida | 1995-06-27 |
| 5428584 | Pickup device for a magneto-optical information recording system | Yoshio Yoshida, Hiroyuki Yamamoto, Renzaburou Miki, Kuniaki Okada, Kouji Minami | 1995-06-27 |
| 5410622 | Optical integrated circuit having light detector | Kuniaki Okada, Kouji Minami, Renzaburo Miki, Hiroyuki Yamamoto, Yoshio Yoshida | 1995-04-25 |
| 5410623 | Optical device having two optical waveguides connected and a method of producing the same | Kouji Minami, Kuniaki Okada, Renzaburo Miki, Hiroyuki Yamamoto, Yoshio Yoshida | 1995-04-25 |
| 5410529 | Optical pickup apparatus | Yukinori Nishitani, Yoshio Yoshida, Takahiro Miyake | 1995-04-25 |
| 5408264 | Three-dimensional image display apparatus for optically synthesizing images formed on different surfaces on a display screen | Keiji Sakai, Yoshio Yoshida, Takahiro Miyake, Toshio Ishikawa | 1995-04-18 |
| 5408450 | Optical pickup apparatus | Toshiya Nagahama, Yoshio Yoshida | 1995-04-18 |
| 5391865 | Optical pickup apparatus and optical grating assembly therefor | Hiroshi Ogata, Hikaru Nishihara, Mitsuharu Tomura, Shigeki Tsuji | 1995-02-21 |
| 5283690 | Optical diffraction grating element | Takahiro Miyake, Yoshio Yoshida | 1994-02-01 |
| 5283772 | Optical head | Takahiro Miyake, Yoshio Yoshida, Hideaki Sato | 1994-02-01 |
| 5279924 | Manufacturing method of optical diffraction grating element with serrated gratings having uniformly etched grooves | Keiji Sakai, Katsuhiro Kubo, Takahiro Miyake, Yoshio Yoshida | 1994-01-18 |