Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6798792 | Laser device and light signal amplifying device using the same | — | 2004-09-28 |
| 6795460 | Laser device and an optical signal amplifier using thereof | — | 2004-09-21 |
| 6533883 | Method of manufacturing optical medium | Akiyoshi Tanaka | 2003-03-18 |
| 6053012 | Method for manufacturing glass preform and glass fiber | — | 2000-04-25 |
| 6042739 | Etchant and method for etching chalcogenide glass and optical member having smooth surface | — | 2000-03-28 |
| 5917108 | Drawing a chalcogenide glass fiber in a sulfur atmosphere | Hiromasa Tawarayama | 1999-06-29 |
| 5856882 | Optical fibers and optical fiber amplifiers | Hiroaki Yanagita, Etsuko Hayashi, Hisayoshi Toratani | 1999-01-05 |
| 5764661 | Laser glasses and laser glass fibers | Hiromasa Tawarayama, Hiroaki Yanagita, Hisayoshi Toratani | 1998-06-09 |
| 4783245 | Process and apparatus for producing alloy containing terbium and/or gadolinium | Eiji Nakamura, Shigeaki Sasaki, Masahiro Nishio, Mikio Sakakibara | 1988-11-08 |
| 4747924 | Apparatus for producing neodymium-iron alloy | Yoshiaki Watanabe, Eiji Nakamura, Masayasu Toyoshima | 1988-05-31 |
| 4737248 | Process for producing dysprosium-iron alloy and neodymium-dysprosium-iron alloy | Eiji Nakamura, Masahiro Nishio, Mikio Sakakibara | 1988-04-12 |
| 4684448 | Process of producing neodymium-iron alloy | Yoshiaki Watanabe, Eiji Nakamura, Masayasu Toyoshima | 1987-08-04 |
| 4521284 | Electrolytic method of producing a high purity aluminum-lithium mother alloy | Zenichi Tanabe, Yoshiaki Watanabe | 1985-06-04 |