Individual holder
DUVAL LEONARD A
3 granted patents·44 citations·filing 1979–1984
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
3 records- 0159US4288329AMethod and apparatus for cleaning fine waste material mixed with oil and waterDUVAL LEONARD A·Filed 1979·Granted Sep 8, 1981·20 cites·2 claims
- 0243US4406796AMethod and apparatus for cleaning fine waste material mixed with oil and waterDUVAL LEONARD A·Filed 1981·Granted Sep 27, 1983·13 cites·6 claims
- 0342US4696114AMethod and apparatus for the drying of solid materials by displacementDUVAL LEONARD A·Filed 1984·Granted Sep 29, 1987·11 cites·22 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →