Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5122707 | Cathode in a cathode ray tube | Hisao Nakanishi, Kinjiro Sano, Toyokazu Kamata, Keiji Watanabe, Masato Saito +2 more | 1992-06-16 |
| 4924137 | Cathode for electron tube | Keiji Watanabe, Keiji Fukuyama, Ryo Suzuki, Masato Saito | 1990-05-08 |
| 4897574 | Hot cathode in wire form | Masato Saito, Keiji Fukuyama, Keiji Watanabe, Toyokazu Kamata, Kinjiro Sano +1 more | 1990-01-30 |
| 4797593 | Cathode for electron tube | Masato Saito, Keiji Fukuyama, Keiji Watanabe, Toyokazu Kamata, Kinjiro Sano | 1989-01-10 |