Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE39330 | Speaker system and a method for improving sound quality thereof | — | 2006-10-10 |
| 6320971 | Speaker system and a method for improving sound quality thereof | — | 2001-11-20 |
| 4230787 | Magnetic toner for developing latent electrostatic images and a process for the preparation thereof | Shotaro Watanabe, Shigeru Uetake | 1980-10-28 |