Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844052 | Apparatus for transmitting liquid and gas in an endoscope | Keiichi Iwakoshi, Mitsuru Sato, Toshinori Nishizawa | 1989-07-04 |
| 4841951 | Angle portion of encoscope | — | 1989-06-27 |
| 4836187 | Constant pressure apparatus of an endoscope | Keiichi Iwakoshi, Mitsuru Sato, Toshinori Nishizawa | 1989-06-06 |
| 4834069 | Endoscope with improved inserting portion | — | 1989-05-30 |