Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10138153 | Glass substrate molding method | Shiro FUNATSU, Keiichiro URAJI, Masashi Takei, Yasushi Hirata, Shoichi Mori | 2018-11-27 |
| 8404604 | Optical glass | Tatsuo Hidaka, Junichi Nakamura, Yoshitaka Mayumi, Hidekazu Hashima, Kohei Fukumi +1 more | 2013-03-26 |
| 8298974 | Optical glass | Tatsuo Hidaka, Junichi Nakamura, Takuro Ikeda, Hidekazu Hashima, Kohei Fukumi +1 more | 2012-10-30 |
| 7349612 | Optical element, optical circuit provided with the optical element, and method for producing the optical element | Tatsuhiro Nakazawa, Shigeo Kittaka, Keiji Tsunetomo | 2008-03-25 |
| 7305155 | Optical element and wavelength separator using the same | Kazuaki Oya, Tatsuhiro Nakazawa, Shigeo Kittaka, Keiji Tsunetomo | 2007-12-04 |
| 7170600 | Spectrometer using diffraction grating | Tatsuhiro Nakazawa, Shigeo Kittaka, Keiji Tsunetomo, Kazuaki Oya | 2007-01-30 |
| 6984436 | Graded material and method for synthesis thereof and method for processing thereof | Tadashi Koyama, Jun Yamaguchi | 2006-01-10 |
| 6514576 | Method of manufacturing a diffraction grating | Kenji Kintaka, Noboru Tohge | 2003-02-04 |
| 6280700 | Film of titanium dioxide containing silicon dioxide and a method of forming the same | Adilson Oliveira da Silva, Derek A. H. Cunningham, Takahiro Inoue | 2001-08-28 |
| 5879424 | Optical micro-machining method of glass | Hiroshi Yamanaka | 1999-03-09 |
| 5851938 | Glass material variable in volume by irradiation with ultraviolet light | Hiroshi Yamanaka | 1998-12-22 |
| 5763340 | Method for production of SiO.sub.2 glass material having regions changed in light refractive index and SiO.sub.2 glass material produced by the method | Kohei Fukumi, Akiyoshi Chayahara, Kanenaga Fujii, Hiroshi Yamanaka | 1998-06-09 |
| 5716762 | Production method of diffraction grating | Hiroshi Yamanaka | 1998-02-10 |
| 4908053 | Process for producing chalcogenide glass fiber | Ikuo Inagawa, Takashi Yamagishi, Shozo Morimoto, Ryuji Iizuka | 1990-03-13 |
| 4801442 | Method for purifying starting materials for fabricating chalchogenide glass | Takashi Yamagishi | 1989-01-31 |