Issued Patents All Time
Showing 1–25 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9604853 | Light transmitting metal oxide sintered body manufacturing method and light transmitting metal oxide sintered body | Masanori Ikari | 2017-03-28 |
| 9052415 | Magneto-optical ceramic material and method for selecting same | — | 2015-06-09 |
| 7823418 | Method of making glass base material | Yuuji Tobisaka, Kazuhisa Hatayama, Hideo Hirasawa | 2010-11-02 |
| 7788951 | Method of elongating an optical fiber base material | Takaaki Nagao, Soichiro Kemmochi | 2010-09-07 |
| 7213416 | Glass base material producing device | Yuuji Tobisaka, Kazuhisa Hatayama, Hideo Hirasawa | 2007-05-08 |
| 7093412 | Glass base material packing method | Takaaki Nagao, Hideo Hirasawa | 2006-08-22 |
| 7082791 | Apparatus for fabricating soot preform for optical fiber | Dai Inoue, Go Ogino, Tetsuya Otosaka, Hideo Hirasawa | 2006-08-01 |
| 7055345 | Glass base material manufacturing apparatus and glass base material manufacturing method | Yuuji Tobisaka, Hiroshi Machida, Masataka Watanabe, Hiroshi Tsumura, Hideo Hirasawa | 2006-06-06 |
| 6988382 | Method for manufacturing glass-base-material by measuring the weight of the material | Junichiro Takei, Hideo Hirasawa | 2006-01-24 |
| 6941772 | Apparatus and method for manufacturing glass-base-material | Junichiro Takei, Hideo Hirasawa | 2005-09-13 |
| 6848276 | Optical fiber manufacture method, preform manufacture method, and preform manufacture apparatus | Yoshiaki Shimizu, Takaaki Nagano, Hideo Hirasawa, Masataka Watanabe, Kazuhisa Hatayama +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, Hideo Hirasawa, Masataka Watanabe, Kazuhisa Hatayama +5 more | 2004-08-24 |
| 6742363 | Straightening a glass rod for use in making an optical fiber preform | Waichi Yamamura, Mitsukuni Sakashita, Hideo Hirasawa | 2004-06-01 |
| 6735986 | Apparatus for preventing redeposition of silica during flame severing | Shinji Suzuki, Hideo Hirasawa | 2004-05-18 |
| 6698240 | Apparatus for manufacturing glass base material and a method for manufacturing glass base material | Hiroshi Tsumura, Hiroyuki Koide, Yuuji Tobisaka, Kazuhisa Hatayama, Go Ogino +1 more | 2004-03-02 |
| 6672112 | OVD apparatus including air-regulating structure | Yuuji Tobisaka, Hiroshi Machida, Masataka Watanabe, Hiroshi Tsumura, Hideo Hirasawa | 2004-01-06 |
| 6640589 | Glass base material drawing apparatus and method for drawing glass base material | Mitsukuni Sakashita, Shoji Hoshino, Waichi Yamamura, Hideo Hirasawa | 2003-11-04 |
| 6546759 | Glass base material manufacturing apparatus with super imposed back-and-forth burner movement | Yuuji Tobisaka, Hiroshi Machida, Masataka Watanabe, Hiroshi Tsumura, Hideo Hirasawa | 2003-04-15 |
| 6549711 | Soliton pulse compression optical fiber and method for making soliton pulse compression optical fiber | Kazuo Koya, Noboru Edagawa, Masatoshi Suzuki, Itsuro Morita | 2003-04-15 |
| 6532776 | Method and apparatus for fusing an optical fiber preform | Shinji Suzuki, Hideo Hirasawa | 2003-03-18 |
| 6467311 | Double flame polishing method for fiber preforms | Hideki Fujii, Takaaki Nagao, Shoji Hoshino, Hideo Hirasawa | 2002-10-22 |
| 6467310 | Method for producing optical fiber base material ingot by grinding while core portion central axis is brought into line with rotational axis of grinding machine | Masami Terashima, Hideo Hirasawa | 2002-10-22 |
| 6442978 | Apparatus for sintering a porous glass base material and a method therefor | Takeshi Kamio, Hiroyuki Koide, Hiroshi Tsumura, Hideo Hirasawa | 2002-09-03 |
| 6386001 | Optical fiber manufacture method including elongating a preform in a vertical direction and a horizontal direction | Yoshiaki Shimizu, Takaaki Nagano, Hideo Hirasawa, Masataka Watanabe, Kazuhisa Hatayama +5 more | 2002-05-14 |
| 6354112 | Method of depositing glass soot with controlling reaction chamber humidity to prevent accumulation of excess soot | Yasuhiro Nakashima, Hideo Hirasawa | 2002-03-12 |