Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5050138 | Electronic wrist watch having a sound producing unit and an electrooptic data display unit | Wataru Yamada, Hiroyuki Abe, Shunji Minami, Shigeru Katoh, Junro Yano | 1991-09-17 |
| 4985878 | Electronic timepiece with analog time display unit and electrooptic data display unit | Wataru Yamada, Hiroyuki Abe, Shunji Minami, Shigeru Katoh, Junro Yano | 1991-01-15 |
| 4697931 | Electronic timepiece including slidable digital display sections | Masayoshi Okuyama, Isao Mimura, Etsuro Nakajima | 1987-10-06 |
| 4426159 | Electronic time keeping device | Kazumitu Kosaka, Shigeru Katoh, Hitoshi Tsutsui | 1984-01-17 |