Inventor · disambiguated record
William Walter Marshall, Iv
Also filed as: MARSHALL IV WILLIAM WALTER · MARSHALL WILLIAM W
3 granted patents·125 citations·filing 1987–2019
71Inventor score
Top patents by PatentIndex Score
3 records- 0191US10393182B2Power end frame assembly for reciprocating pumpSPM FLOW CONTROL INC·Filed 2015·Granted Aug 27, 2019·5 cites·26 claims
- 0291US4841404APump and electric motor protectorSPRING VALLEY ASSOCIATES INC·Filed 1987·Granted Jun 20, 1989·120 cites·10 claims
- 0370US11898553B2Power end frame assembly for reciprocating pumpSPM OIL & GAS INC·Filed 2019·Granted Feb 13, 2024·0 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →