Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4815099 | Data circuit-terminating equipment | Yoshihiro Kawata, Masayuki Kawashima, Hideharu Omori | 1989-03-21 |
| 4805165 | Time division multiplex data transmission method and apparatus | Masataka Kawamura | 1989-02-14 |