Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7339697 | Apparatus for and method of recording image based on detected recording duty ratio | Takeshi Fujii, Youichi Hatano, Katsuto Sumi, Fumiaki Miyamaru | 2008-03-04 |
| 5907428 | Acousto-optic element light deflector light beam scanning apparatus and image recording apparatus | Katsuto Sumi | 1999-05-25 |