Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11317777 | Method of cleaning hard surface flooring with portable liquid-recycling liquid-reusing cleaning system | Robert S. Robinson | 2022-05-03 |
| 10959592 | Portable liquid-recycling liquid-reusing cleaning system for hard surface flooring | Robert S. Robinson | 2021-03-30 |
| 10368710 | Ergonomic multi-functional cleaning machine | Robert S. Robinson | 2019-08-06 |
| 7316049 | Apparatus and method for evacuating a liquid | Robert S. Robinson | 2008-01-08 |
| 6789552 | Method of cleaning a toilet | Robert S. Robinson | 2004-09-14 |
| 4237980 | Check valve for fluid-producing wells | — | 1980-12-09 |
| 4235032 | Point-of-sales display | — | 1980-11-25 |