Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4675868 | Error correction system for difference set cyclic code in a teletext system | Hirohisa Shishikura, Ichiro Sase, Osamu Yamada | 1987-06-23 |
| 4672612 | Error correction system in a teletext system | Hirohisa Shishikura, Ichiro Sase, Osamu Yamada, Shigeharu Ueguri | 1987-06-09 |