Issued Patents All Time
Showing 1–25 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7823418 | Method of making glass base material | Tadakatsu Shimada, Yuuji Tobisaka, Kazuhisa Hatayama | 2010-11-02 |
| 7752869 | Optical fiber preform, method for manufacturing thereof, and optical fiber obtained by drawing thereof | Tetsuya Otosaka, Dai Inoue, Hiroshi Oyamada, Jun Abe | 2010-07-13 |
| 7213416 | Glass base material producing device | Tadakatsu Shimada, Yuuji Tobisaka, Kazuhisa Hatayama | 2007-05-08 |
| 7093412 | Glass base material packing method | Takaaki Nagao, Tadakatsu Shimada | 2006-08-22 |
| 7082791 | Apparatus for fabricating soot preform for optical fiber | Dai Inoue, Go Ogino, Tetsuya Otosaka, Tadakatsu Shimada | 2006-08-01 |
| 7055345 | Glass base material manufacturing apparatus and glass base material manufacturing method | Yuuji Tobisaka, Tadakatsu Shimada, Hiroshi Machida, Masataka Watanabe, Hiroshi Tsumura | 2006-06-06 |
| 6988382 | Method for manufacturing glass-base-material by measuring the weight of the material | Junichiro Takei, Tadakatsu Shimada | 2006-01-24 |
| 6941772 | Apparatus and method for manufacturing glass-base-material | Junichiro Takei, Tadakatsu Shimada | 2005-09-13 |
| 6848276 | Optical fiber manufacture method, preform manufacture method, and preform manufacture apparatus | Yoshiaki Shimizu, Takaaki Nagano, Tadakatsu Shimada, 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, Tadakatsu Shimada, 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, Tadakatsu Shimada | 2004-06-01 |
| 6735986 | Apparatus for preventing redeposition of silica during flame severing | Shinji Suzuki, Tadakatsu Shimada | 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, Tadakatsu Shimada, Hiroshi Machida, Masataka Watanabe, Hiroshi Tsumura | 2004-01-06 |
| 6640589 | Glass base material drawing apparatus and method for drawing glass base material | Mitsukuni Sakashita, Shoji Hoshino, Tadakatsu Shimada, Waichi Yamamura | 2003-11-04 |
| 6546759 | Glass base material manufacturing apparatus with super imposed back-and-forth burner movement | Yuuji Tobisaka, Tadakatsu Shimada, Hiroshi Machida, Masataka Watanabe, Hiroshi Tsumura | 2003-04-15 |
| 6532776 | Method and apparatus for fusing an optical fiber preform | Shinji Suzuki, Tadakatsu Shimada | 2003-03-18 |
| 6467311 | Double flame polishing method for fiber preforms | Hideki Fujii, Takaaki Nagao, Shoji Hoshino, Tadakatsu Shimada | 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, Tadakatsu Shimada | 2002-10-22 |
| 6442978 | Apparatus for sintering a porous glass base material and a method therefor | Takeshi Kamio, Hiroyuki Koide, Hiroshi Tsumura, Tadakatsu Shimada | 2002-09-03 |
| 6386001 | Optical fiber manufacture method including elongating a preform in a vertical direction and a horizontal direction | Yoshiaki Shimizu, Takaaki Nagano, Tadakatsu Shimada, 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, Tadakatsu Shimada | 2002-03-12 |
| 6306500 | Porous optical fiber base materials, optical fiber base materials and methods for producing them | Haruyoshi Kuwabara, Tadakatsu Shimada | 2001-10-23 |
| 6220057 | Apparatus and method for drawing a glass ingot | Waichi Yamamura, Tadakatsu Shimada, Soichiro Kemmochi | 2001-04-24 |
| 6178778 | Method of stretching an optical fiber preform with monitoring the diameter at two locations | Soichiro Kenmochi, Tadakatsu Shimada, Akihiko Suzuki, Waichi Yamamura, Yoshiaki Shimizu | 2001-01-30 |