Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6816130 | Display apparatus for use in athletic games | Yukinori Nagao, Masayuki Tanaka, Katsumi Kobayashi, Mitsuo Koyama, Norihiro Yuki | 2004-11-09 |
| 6685585 | Ball for ball game | Shigeo Doi, Yoshihisa Okimura | 2004-02-03 |