Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7919366 | Laser crystallization method for amorphous semiconductor thin film | Keiu Tokumura, Ryotaro Togashi, Toshio Inami, Hideaki Kusama, Tatsumi Goto | 2011-04-05 |
| 7170685 | Production method for optical lens and production method for optical fiber connector | Keiu Tokumura | 2007-01-30 |
| 7121735 | Optical fiber connector, method for manufacturing the same, and optical coupling apparatus | Keiu Tokumura | 2006-10-17 |
| 7023893 | Low-pressure axial direction excitation type F2 laser oscillator | — | 2006-04-04 |
| 6255619 | Lens, semiconductor laser element, device for machining the lens and element, process for producing semiconductor laser element, optical element, and device and method for machining optical element | Keiu Tokumara, Hisashi Tamamura | 2001-07-03 |
| 5729344 | Method and apparatus for forming an optical surface by optical etching | Nobuaki Nakashima, Masahiro Nakatsuka, Keiu Tokumura | 1998-03-17 |