Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6738584 | Method for optical fiber communication, and terminal device and system for use in carrying out the method | Takashi Tsuda, Kazuo Yamane, Yumiko Kawasaki | 2004-05-18 |
| 6570691 | Optical transmission system using in-line amplifiers | Akira Miyauchi, Kazuo Yamane, Yumiko Kawasaki | 2003-05-27 |
| 6496288 | Wavelength multiplexing transmission apparatus and wavelength demultiplexing reception apparatus | Kazuo Yamane, Takashi Tsuda, Yumiko Kawasaki | 2002-12-17 |
| 6449074 | Optical transmission device and optical communication system | Hiroshi Nishimoto, Kazuo Yamane, Takashi Tsuda, Yumiko Kawasaki | 2002-09-10 |
| 6295147 | Wavelength multiplexing transmission apparatus and wavelength demultiplexing reception apparatus | Kazuo Yamane, Takashi Tsuda, Yumiko Kawasaki | 2001-09-25 |
| 6288836 | Optical amplifier and optical communication system having the optical amplifier | Yumiko Kawasaki, Kazuo Yamane, Hiroshi Nishimoto, Takashi Tsuda | 2001-09-11 |
| 6038063 | Optical amplifier and optical transmission system including the optical amplifier | Takashi Tsuda, Hiroshi Nishimoto, Kazuo Yamane, Yumiko Kawasaki | 2000-03-14 |
| 5877881 | Optical transmission system | Akira Miyauchi, Kazuo Yamane, Yumiko Kawasaki | 1999-03-02 |