Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE36133 | Hub ring and supporting plate for a filter and methods for manufacturing these members | Keiichi Murakami | 1999-03-09 |
| 5858230 | Hub ring and supporting plate for a filter | Keiichi Murakami | 1999-01-12 |
| 5829138 | Hub ring and supporting plate for a filter and methods for manufacturing these members | Keiichi Murakami | 1998-11-03 |
| 5788860 | Method for manufacturing a supporting plate for a filter | Keiichi Murakami | 1998-08-04 |
| 5755034 | Method for manufacturing a hub ring for a filter | Keiichi Murakami | 1998-05-26 |
| 5611925 | Hub ring and supporting plate for a filter and methods for manufacturing these members | Keiichi Murakami | 1997-03-18 |