Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820145 | Polycrystalline silicon wafer tray | Takashi Yokoyama, Keiji Sawaya, Takeshi Matsuyama | 1989-04-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820145 | Polycrystalline silicon wafer tray | Takashi Yokoyama, Keiji Sawaya, Takeshi Matsuyama | 1989-04-11 |