Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4890273 | Optical information recording/reproducing system with variable gain servo error correction in response to detected track formats | Yoshiaki Ikeda | 1989-12-26 |
| 4878746 | Surgical microscope apparatus | Hiroshi Nakano, Toshiyuki Tsunoda, Masahiko Kinukawa | 1989-11-07 |