Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5137777 | Fire-retardant polymer foam composites | Lance D. Silverman, Wilfred E. Willis | 1992-08-11 |
| 5066531 | Variable thickness foam plank | Wilfred E. Willis | 1991-11-19 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5137777 | Fire-retardant polymer foam composites | Lance D. Silverman, Wilfred E. Willis | 1992-08-11 |
| 5066531 | Variable thickness foam plank | Wilfred E. Willis | 1991-11-19 |