Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5108614 | Device and a method for filtering a liquid with wood ash to remove impurities therefrom | Jean Shoiry, Subba Narasiah | 1992-04-28 |
| 4273538 | Educational aid | — | 1981-06-16 |