Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5230760 | Method for manufacturing micro membrane pleats type filter cartridge | — | 1993-07-27 |
| 5215661 | Multi-layer filter cartridge | — | 1993-06-01 |
| 5026478 | Metal holder and protector for a disposable plastic capsule | Katsutoshi Bonkohara | 1991-06-25 |