Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4290749 | Perlite expansion process and apparatus therefor | — | 1981-09-22 |
| 4244720 | Fiber waste and cullet collection process and apparatus therefor | Howard E. Boen, John H. Miller, Samuel R. Genson | 1981-01-13 |