Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4444860 | Layered persistent photoconductive element comprises pigment layer and polymer layer containing polyvinyl carbazole | Sumitaka Nogami, Yoshiharu Kitahama, Isamu Iwami | 1984-04-24 |
| 4254337 | Infrared interference type film thickness measuring method and instrument therefor | Shingo Ishikawa | 1981-03-03 |
| 4243882 | Infrared multilayer film thickness measuring method and apparatus | Naoyuki Shiratori, Shingo Ishikawa | 1981-01-06 |