Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5343591 | Washing apparatus for walls and other non-horizontal surfaces | — | 1994-09-06 |
| 4955721 | Apparatus for applying a sulphur-based structural material to paved surfaces | James W. Marshall | 1990-09-11 |