Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844052 | Apparatus for transmitting liquid and gas in an endoscope | Mitsuru Sato, Hiroyuki Umeda, Toshinori Nishizawa | 1989-07-04 |
| 4836187 | Constant pressure apparatus of an endoscope | Mitsuru Sato, Hiroyuki Umeda, Toshinori Nishizawa | 1989-06-06 |
| 4805597 | Endoscopic apparatus | — | 1989-02-21 |