Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4567700 | Frame-supported membrane for chimney | — | 1986-02-04 |
| 4519303 | Chimney lining system including frame-supported membrane | — | 1985-05-28 |
| 4265166 | Corrosion resistant membrane for chimney liner | John A. Parker, Sid Handler | 1981-05-05 |