Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12420344 | Base material for hard sintered body, hard sintered body, and cutting tool | Masayuki KOSHIYAMA, Toshihiko Matsuo, Koji Fukata | 2025-09-23 |
| 9612110 | Observation device of cornea for transplantation, and auxiliary light source unit used for the same | Debra Skelnik | 2017-04-04 |
| 7221385 | Picture phone apparatus which checks validity of picture and picture phone system using the same | — | 2007-05-22 |
| 5757461 | Method for displaying a photographing point of a cornea in an apparatus for obtaining video images of corneal cells | Tatsuya Kasahara, Yoshizo Ikegami | 1998-05-26 |
| 5742863 | Film holder | Yoshibumi Udagawa, Takeshi Okano, Tokuji Sato | 1998-04-21 |
| 5557351 | Apparatus for obtaining visual images of cornea cells and method for displaying imaging-position around cornea for the apparatus | Tatsuya Kasahara, Yoshizo Ikegami | 1996-09-17 |
| 5448324 | Sheet film pack and film pack holder | Takeshi Okano, Yoshibumi Udagawa | 1995-09-05 |
| 5320734 | Test apparatus for measuring concentration of test substance in liquid | Koichi Yamasaki, Tatsuhiko Osaka, Hitonaga Nakano, Toji Mukai, Yasuhiro Nagata +2 more | 1994-06-14 |
| 5228972 | Apparatus for measuring concentration of test substance in liquid | Tatsuhiko Osaka, Koichi Yamasaki, Hiroshi Terawaki, Toji Mukai, Sadaaki Nakaoka +1 more | 1993-07-20 |