Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4811529 | Fire resistant flexible seal | Leonard C. Spriggs, Ralph J. Block | 1989-03-14 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4811529 | Fire resistant flexible seal | Leonard C. Spriggs, Ralph J. Block | 1989-03-14 |