Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7686887 | Quartz glass crucible for pulling up silicon single crystal and method for producing the same | Yasuo Ohama | 2010-03-30 |
| 7299658 | Quartz glass crucible for the pulling up of silicon single crystal | Yasuo Ohama, Shigeo Mizuno | 2007-11-27 |
| 7074731 | Method for producing hydrogen-doped silica powder, hydrogen-doped silica powder obtained from that method for use in a quartz glass crucible | Yasuo Ohama | 2006-07-11 |
| 6510707 | Methods for making silica crucibles | Katsuhiko Kemmochi, Robert Mosier, Paul Spencer | 2003-01-28 |