Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5007693 | Method for controlling polarizations of signal lights in an optical frequency division multiplex coherent communication system | Takashi Ono, Haruhito Shimizu | 1991-04-16 |
| 4912527 | Optical apparatus for pulling an intermediate frequency in a predetermined frequency range | — | 1990-03-27 |
| 4903342 | Optical heterodyne homodyne detection apparatus | — | 1990-02-20 |
| 4700352 | FSK laser transmitting apparatus | Minoru Shikada, Sadao Fujita | 1987-10-13 |