DiGregorio; David
Patent Applications and Registrations
Patent applications and USPTO patent grants for DiGregorio; David.The latest application filed is for "two-phase orbital-type wastewater treatment system and method".
- DiGregorio; David - Salt Lake City UT
| Patent | Date |
|---|---|
| Two-phase orbital-type wastewater treatment system and method Grant 5,234,595 - DiGregorio , et al. August 10, 1 | 1993-08-10 |
| Aerobic waste sludge digester-thickener orbital system and method Grant 4,940,545 - DiGregorio , et al. July 10, 1 | 1990-07-10 |
| Gas-liquid dissolving tank Grant 4,275,020 - DiGregorio , et al. June 23, 1 | 1981-06-23 |
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