Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6511623 | Manufacturing method of filter element | Noriya Ueda | 2003-01-28 |
| 4834700 | Method of and apparatus for forming filter element | Naohiko Kondo, Mineo Hanai, Yoshiaki Miyagawa, Yuji Ito, Takatoshi Iwase | 1989-05-30 |