Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6684447 | Cleaning sponge roller | Shuki Gohda, Masao Ide, Koei Igarashi, Konomu Tokunaga, Hiroshi Miyaji | 2004-02-03 |
| 6502273 | Cleaning sponge roller | Shuki Gohda, Masao Ide, Koei Igarashi, Konomu Tokunaga, Hiroshi Miyaji | 2003-01-07 |