Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6819529 | Head drum device with carbon-containing synthetic resin upper drum and larger diameter intermediate drum | Junya Endo, Masanori Maehara, Masahiro Kiko, Tamami Mishiro, Kentaro Shingai | 2004-11-16 |