Inventor · disambiguated record
Melvin J. Hargraves
Also filed as: HARGRAVES MELVIN J
2 granted patents·25 citations·filing 1976–1978
60Inventor score
Files withWKM WELLHEAD SYSTEMS2
Top patents by PatentIndex Score
2 records- 0153US4137942AControl valve having integral visual indicator for fluid safety systemsWKM WELLHEAD SYSTEMS·Filed 1976·Granted Feb 6, 1979·13 cites·10 claims
- 0247US4194529AControl valve having integral visual indicator for fluid safety systemsWKM WELLHEAD SYSTEMS·Filed 1978·Granted Mar 25, 1980·12 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →