William J. Friedman
10Patents
6h-index
4Co-inventors
48Inventor score
Filing activity: Jun 7, 1995 → Sep 2, 1998
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6082979A | Air pump for vacuum toilet systems | Fixed Constructions | 16 | Expired |
| US5931642A | Plastic combined vacuum and holding tank | Fixed Constructions | 15 | Expired |
| US5621924A | Vacuum tank construction for a vacuum toilet assembly | Fixed Constructions | 15 | Expired |
| US5681148A | Vacuum/holding tank | Fixed Constructions | 11 | Expired |
| US6234197A | Holding tank vacuum relief | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5860799A | Pulsation damper for marine tank pumpout systems | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6065493A | Vacuum relief valve for sewage holding tank | Emerging Cross-Sectional Technologies | 6 | Expired |
| US5939160A | Low odor permeable hose | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6216284A | Low odor permeable hose | Emerging Cross-Sectional Technologies | 1 | Expired |
| US5806454A | Discharge hose adapter for boat holding tank | Emerging Cross-Sectional Technologies | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.