Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4624735 | Constituent members of a semiconductor element-manufacturing apparatus and a reaction furnace for making said constituent members | Masao Koyama, Syuitu Matuo, Chiaki Nakayama | 1986-11-25 |
| 4424193 | Constituent members of a semiconductor element-manufacturing apparatus and a reaction furnace for making said constituent members | Masao Koyama, Syuitu Matuo, Chiaki Nakayama | 1984-01-03 |