Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877526 | Flexible filter bag and method of fabrication | Corazon C. Brizuela | 1989-10-31 |
| 4863602 | Flexible filter element employing filtering sheets formed with bypass openings | — | 1989-09-05 |