Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6878201 | Methods of making fluoride crystal and fluoride crystal lens | Tomoru Oba | 2005-04-12 |
| 6875275 | Production apparatus for producing a crystal | — | 2005-04-05 |
| 6342312 | Calcium fluoride crystal, optical article and exposure apparatus for photo-lithography using the same | Tomoru Oba | 2002-01-29 |
| 6270570 | Fluoride crystal, optical article, and production method | Tomoru Ohba | 2001-08-07 |