Issued Patents All Time
Showing 26–50 of 58 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7027231 | Endoscope objective lens | — | 2006-04-11 |
| 6994668 | Four-group endoscope objective lens | — | 2006-02-07 |
| 6852079 | Light guide and endoscope | — | 2005-02-08 |
| 6674581 | Zoom lens | — | 2004-01-06 |
| 6595916 | Endoscope apparatus using curvature of field | Itsuji Minami | 2003-07-22 |
| 6490096 | Achromatic lens and zoom lens using the same | — | 2002-12-03 |
| 6469836 | Eyepiece | Chikara Yamamoto | 2002-10-22 |
| 6400514 | Endoscope objective lens | Itsuji Minami | 2002-06-04 |
| 6383131 | Stereoscopic endoscope | Chikara Yamamoto | 2002-05-07 |
| 6327101 | Objective lens for variable viewing depth endoscope | — | 2001-12-04 |
| 6307683 | Zoom lens | — | 2001-10-23 |
| 6251068 | Endoscopic observation system | Haruo Akiba, Itsuji Minami, Naotake Mitsumori | 2001-06-26 |
| 6181481 | Objective lens for endoscope | Chikara Yamamoto | 2001-01-30 |
| 5971915 | Stereoscopic endoscope | Chikara Yamamoto | 1999-10-26 |
| 5936778 | Objective lens for endoscope | Chikara Yamamoto | 1999-08-10 |
| 5840014 | Endoscope | Chikara Yamamoto | 1998-11-24 |
| 5781281 | Distance measuring infrared projection system | — | 1998-07-14 |
| 5777797 | Objective lens system for endoscopes having an image transfer optical fiber bundle | — | 1998-07-07 |
| 5748385 | Objective lens for variable field angle endoscope | — | 1998-05-05 |
| 5703724 | Objective lens system for endoscope | — | 1997-12-30 |
| 5691853 | Objective lens for endoscopes | — | 1997-11-25 |
| 5691854 | Zoom lens with differential focal compensation for visible, IR, and UV light | Shigeru Yoshida | 1997-11-25 |
| 5610390 | Solid-state image pickup device having microlenses each with displaced optical axis | — | 1997-03-11 |
| 5596666 | Illumination system for endoscopes | Masaaki Morizumi | 1997-01-21 |
| 5587839 | Objective lens system for endoscope | Chikara Yamamoto | 1996-12-24 |