Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8247336 | Optical glass composition, preform and optical element | — | 2012-08-21 |
| 7978426 | Prism and optical device | Tomokazu Tokunaga, Eiichi Nagaoka | 2011-07-12 |
| 7897532 | Optical glass composition, preform and optical element | Kazuhiko Ishimaru, Shoji Nakamura | 2011-03-01 |
| 7897533 | Optical glass composition, preform and optical element | Kazuhiko Ishimaru, Shoji Nakamura | 2011-03-01 |
| 7859776 | Prism, imaging device and lighting device including the same, and prism manufacturing method | Toshiaki Takano, Tomokazu Tokunaga | 2010-12-28 |
| 7589923 | Prism, imaging device and lighting device including the same, and prism manufacturing method | Toshiaki Takano, Tomokazu Tokunaga | 2009-09-15 |
| 6718799 | Die and glass material for forming glass substrate, method for manufacturing glass substrate, and magnetic disk glass substrate | Kazuaki Takagi, Kunio Hibino, Tomokazu Tokunaga, Fujio Okuyama | 2004-04-13 |
| 6539750 | Glass substrate forming mold and production method for glass substrate | Kazuaki Takagi, Kunio Hibino, Tomokazu Tokunaga, Fujio Okuyama | 2003-04-01 |