Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864187 | Cathode for electron tube and manufacturing method thereof | Kinjiro Sano, Toyokazu Kamata, Keiji Fukuyama, Keiji Watanabe | 1989-09-05 |
| 4837478 | Near-infrared ray radiation illuminator and near-infrared ray image pick-up device | Yoshinori Anzai, Takao Saikatsu, Michihiro Tsuchihashi | 1989-06-06 |
| 4797593 | Cathode for electron tube | Keiji Fukuyama, Masako Ishida, Keiji Watanabe, Toyokazu Kamata, Kinjiro Sano | 1989-01-10 |