Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6735358 | Optical multiplexer and optical demultiplexer | Tsutomu Kitoh, Yasuyuki Inoue, Manabu Oguma, Yoshinori Hibino | 2004-05-11 |
| 6606433 | Optical multi/demultiplexer | Manabu Oguma, Akira Himeno, Tsutomu Kitoh, Yoshinori Hibino | 2003-08-12 |
| 6173433 | Circuit design system, image processing method and medium of the circuit design system | Katsumi Katoh | 2001-01-09 |
| 5572611 | Optical signal processor, method of its control, method of its designing, and method of its production | Masao Kawachi, Koichi Takiguchi | 1996-11-05 |
| 5165001 | Guided-wave optical branching device | Akihiro Takagi, Masao Kawachi | 1992-11-17 |
| 5044715 | Guided-wave optical branching components and optical switches | Masao Kawachi, Norio Takato, Akihiro Takagi | 1991-09-03 |
| 4978188 | Integrated optical device and method for manufacturing thereof | Masao Kawachi, Norio Takato, Akio Sugita, Shin Sumida | 1990-12-18 |
| 4900112 | Integrated optical device and method for manufacturing thereof | Masao Kawachi, Norio Takato, Akio Sugita, Shin Sumida | 1990-02-13 |
| 4781424 | Single mode channel optical waveguide with a stress-induced birefringence control region | Masao Kawachi, Norio Takato, Mitsuho Yasu, Katsunari Okamoto | 1988-11-01 |
| 4542957 | Plastics optical fibers | Kazuo Ishiwari, Akira Ohmori, Nobuyuki Tomihashi, Sumiko Yuhara, Toshikuni Kaino +1 more | 1985-09-24 |