Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6226270 | Method and apparatus for path trace check | Isao Chiku, Yoshihiro Yatagai, Yoshitaka Taki | 2001-05-01 |
| 5706280 | Transmission quality monitoring system for a digital communication network | Yoshitaka Taki | 1998-01-06 |
| 5189410 | Digital cross connect system | Yuichi Hashimoto, Masayuki Tanaka, Katsuichi Ohara, Takahiro Furukawa, Makoto Aoki | 1993-02-23 |
| 5119380 | Zero string error detection circuit | Satoshi Ohwada, Takenao Takemura | 1992-06-02 |
| 4887083 | Bipolar with eight-zeros substitution and bipolar with six-zeros substitution coding circuit | Takahiro Furukawa, Hirohisa Miyaou | 1989-12-12 |
| 4841524 | Digital data multiple conversion system for converting data having a frequency to data having another frequency by a digital stuffing method | Hirohisa Miyaou, Takahiro Furukawa | 1989-06-20 |
| 4740959 | System for controlling a change of sequence order of channel data | Katsutoshi Miyaji, Kouichi Sugama, Tamio Oonuma, Minoru Ishikawa | 1988-04-26 |