Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5304227 | Electret filters | Satoshi Matsuura, Tsuneo Kishiba | 1994-04-19 |
| 5256176 | Film electret and an electret filter | Satoshi Matsuura | 1993-10-26 |
| 5246637 | Method for producing electret filter | Satoshi Matsuura, Akira Yokoyama | 1993-09-21 |
| 5143767 | Processes for preparing electret filters | Satoshi Matsuura, Masayuki Mito | 1992-09-01 |