Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4702037 | Service window | John R. Hollowell | 1987-10-27 |
| 4643776 | Battery powered vacuum trash collector | John R. Hollowell | 1987-02-17 |
| 4535501 | Battery powered vacuum trash collector | John R. Hollowell | 1985-08-20 |