Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9607430 | Gradation drawing device | Shoichiro Kuboyama | 2017-03-28 |
| 9057623 | Navigation device | Tsuyoshi Sempuku, Yoko Sano, Hiroshi Shigehara, Makoto Otsuru | 2015-06-16 |
| 8577603 | Navigation device | Masato Hirai, Yoko Sano, Tsuyoshi Sempuku, Makoto Otsuru | 2013-11-05 |