Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7823418 | Method of making glass base material | Tadakatsu Shimada, Yuuji Tobisaka, Hideo Hirasawa | 2010-11-02 |
| 7213416 | Glass base material producing device | Tadakatsu Shimada, Yuuji Tobisaka, Hideo Hirasawa | 2007-05-08 |
| 6848276 | Optical fiber manufacture method, preform manufacture method, and preform manufacture apparatus | Yoshiaki Shimizu, Takaaki Nagano, Tadakatsu Shimada, Hideo Hirasawa, Masataka Watanabe +5 more | 2005-02-01 |
| 6779362 | Method of making an optical fiber preform where a second elongation is based on a mark on a glass rod | Yoshiaki Shimizu, Takaaki Nagano, Tadakatsu Shimada, Hideo Hirasawa, Masataka Watanabe +5 more | 2004-08-24 |
| 6698240 | Apparatus for manufacturing glass base material and a method for manufacturing glass base material | Hiroshi Tsumura, Hiroyuki Koide, Yuuji Tobisaka, Go Ogino, Tadakatsu Shimada +1 more | 2004-03-02 |
| 6386001 | Optical fiber manufacture method including elongating a preform in a vertical direction and a horizontal direction | Yoshiaki Shimizu, Takaaki Nagano, Tadakatsu Shimada, Hideo Hirasawa, Masataka Watanabe +5 more | 2002-05-14 |