Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849050 | Method of producing a diaphragm on a substrate | Alan G. Evans | 1989-07-18 |
| 4849069 | Method of producing filaments | Alan G. Evans | 1989-07-18 |
| 4849071 | Method of forming a sealed diaphragm on a substrate | Alan G. Evans | 1989-07-18 |