Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6756334 | Optical glass | Michiko Ogino, Yoshio Mori, Junko Ishioka | 2004-06-29 |
| 6713419 | Optical glass for precision press molding and optical element | Takehiro Sakamoto | 2004-03-30 |