Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4734138 | Method of removing coating and restoring wood | Marvin B. Langenberg | 1988-03-29 |
| 4652393 | Coating remover and wood restorative compositions and methods of using same | Marvin B. Langenberg | 1987-03-24 |