Inventor · disambiguated record
Victor E. Derval
Also filed as: DERVAL VICTOR E
3 granted patents·204 citations·filing 1974–1975
76Inventor score
Files withWILLIS OIL TOOL CO3
Top patents by PatentIndex Score
3 records- 0195US3958592ASafety shut-off valveWILLIS OIL TOOL CO·Filed 1974·Granted May 25, 1976·157 cites·5 claims
- 0275US4026326AActuator pilot for fluid pressure monitoring safety systemWILLIS OIL TOOL CO·Filed 1975·Granted May 31, 1977·28 cites·2 claims
- 0364US4017053AFluid pressure monitoring safety systemWILLIS OIL TOOL CO·Filed 1974·Granted Apr 12, 1977·19 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →