Grave; Dale L.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Grave; Dale L..The latest application filed is for "perimeter seal structure for a cleaning head".
- Grave; Dale L. - Plymouth MN
| Patent | Date |
|---|---|
| Perimeter seal structure for a cleaning head Grant 4,720,889 - Grave January 26, 1 | 1988-01-26 |
| Filter structure Grant 4,696,075 - Grave September 29, 1 | 1987-09-29 |
| Cleaning head for smooth and napped surface covering materials Grant 4,649,594 - Grave March 17, 1 | 1987-03-17 |
| Rug and upholstery cleaning apparatus Grant 4,488,330 - Grave December 18, 1 | 1984-12-18 |
| Recycling cleaning apparatus Grant 4,466,155 - Grave August 21, 1 | 1984-08-21 |
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