Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D280769 | Sponge mop | Robert S. Johnson, Paul E. Fletcher, John I. Zsitvay | 1985-09-24 |
| 4516287 | Angled roller mop | Robert S. Johnson, Paul E. Fletcher, John I. Zsitvay | 1985-05-14 |