Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4924929 | Folding firedoor lead post assembly | Ronald F. Johnson, E. Carl Goodman, Richard Karl Bowles | 1990-05-15 |
| 4834161 | Folding firedoor lead post assembly | Ronald F. Johnson, E. Carl Goodman, Richard Karl Bowles | 1989-05-30 |