Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6462720 | Light-emitting display device, target game apparatus using light-emitting display device, display switching method and target hit display method | Akihisa Yamashita, Kojiro Minami, Hirofumi Fujimoto, Masatoshi Mukai, Yutaka Tsuji | 2002-10-08 |
| 6383097 | Table tennis apparatus | Kojiro Minami, Toshimitsu Oishi, Akihisa Yamashita, Hideki Kotani, Hirofumi Fujimoto | 2002-05-07 |
| 6220452 | Table tennis ball-sorting device and table tennis apparatus | Akihisa Yamashita, Toshimitsu Oishi, Kojiro Minami, Hideki Kotani, Hirofumi Fujimoto | 2001-04-24 |
| 6200236 | Table tennis apparatus | Kojiro Minami, Toshimitsu Oishi, Akihisa Yamashita, Hideki Kotani, Hirofumi Fujimoto | 2001-03-13 |