Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4797593 | Cathode for electron tube | Masato Saito, Keiji Fukuyama, Keiji Watanabe, Toyokazu Kamata, Kinjiro Sano | 1989-01-10 |
MI
Masako Ishida
Overall (1989): #80,976 of 140,708Top 60%
1
Patents 1989