Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8129299 | Glass composition and process for producing glass composition | Haruki Niida, Akihiro Koyama, Yukihito Nagashima | 2012-03-06 |
| 7786035 | Glass composition and process for producing glass composition | Haruki Niida, Akihiro Koyama, Yukihito Nagashima | 2010-08-31 |
| 7531475 | Glass composition that emits fluorescence in infrared wavelength region | Koichi Sakaguchi, Masahiro Tsuda, Shigeki Nakagaki, Shigekazu Yoshii, Yasushi Fujimoto +1 more | 2009-05-12 |
| 6713418 | Glass article and glass substrate for information recording media using the same | Akihiro Koyama, Hiroyuki Tanaka, Nobuyuki Yamamoto | 2004-03-30 |
| 6451720 | Glass composition, and information recording medium substrate, information recording medium, and information recording device each comprising the composition | Akihiro Koyama, Hiroyuki Tanaka | 2002-09-17 |
| 6399527 | Glass composition and substrate for information recording medium | Akihiro Koyama, Junji Kurachi, Nobuyuki Yamamoto | 2002-06-04 |
| 6376084 | Glass-ceramics, process for producing the same, and substrate for information recording medium, information recording medium and information recording device each using the glass-ceramics | Akihiro Koyama, Hiroyuki Tanaka | 2002-04-23 |
| 6376403 | Glass composition and process for producing the same | Akihiro Koyama, Junji Kurachi, Nobuyuki Yamamoto | 2002-04-23 |
| 6365534 | Glass composition and substrate for information recording media comprising the same | Akihiro Koyama, Junji Kurachi, Nobuyuki Yamamoto | 2002-04-02 |
| 6340647 | Glass composition and substrate for information recording media comprising the same | Akihiro Koyama, Junji Kurachi, Nobuyuki Yamamoto | 2002-01-22 |
| 6333286 | Glass composition and substrate for information recording media comprising the same | Junji Kurachi, Akihiro Koyama, Nobuyuki Yamamoto | 2001-12-25 |
| 6306786 | Glass composition and process for producing the same | Akihiro Koyama, Junji Kurachi, Nobuyuki Yamamoto | 2001-10-23 |
| 6251812 | Glass composition and substrate for information recording media comprising the same | Akihiro Koyama, Junji Kurachi, Nobuyuki Yamamoto | 2001-06-26 |