Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6225983 | Operation key registration system for a coordinate input device | Susumu Yamamoto, Tadahiko Ikegaya, Nobuyuki Shigeeda | 2001-05-01 |
| 5990873 | Single-key input system | Susumu Yamamoto, Tadahiko Ikegaya, Nobuyuki Shigeeda | 1999-11-23 |
| 5341223 | Heirarchical indication, inclusive indication and heirarchical inclusive indication input system | Nobuyuki Shigeeda, Susumu Yamamoto, Tadahiko Ikegaya | 1994-08-23 |
| 5313572 | Filing storage and retrieval equipment and apparatus | Susumu Yamamoto, Nobuyuki Shigeeda, Tadahiko Ikegaya, Katsuhiko Orita | 1994-05-17 |
| 5263129 | Manual sheet production and utilization apparatus | Tadahiko Ikegaya, Susumu Yamamoto, Nobuyuki Shigeeda | 1993-11-16 |