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 | Toshio Ichizaki | 2005-04-12 |
| 6488769 | Fluoride refining method and fluoride crystal manufacturing method, and optical part and aligner using same | — | 2002-12-03 |
| 6342312 | Calcium fluoride crystal, optical article and exposure apparatus for photo-lithography using the same | Toshio Ichizaki | 2002-01-29 |
| 6238479 | Raw material for manufacturing fluoride crystal, refining method of the same, fluoride crystal, manufacturing method of the same, and optical part | — | 2001-05-29 |