Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840471 | X-ray shielded projection lens | Katsuaki Mitani | 1989-06-20 |
HI
Hideki Ishinaga
Overall (1989): #105,331 of 140,708Top 75%
1
Patents 1989