Inventor · disambiguated record
Ralph Purvis
Also filed as: PURVIS RALPH
3 granted patents·31 citations·filing 1998–2011
70Inventor score
Top patents by PatentIndex Score
3 records- 0174US8126634B2Method and apparatus for controlling an engine capable of operating on more than one type of fuelVESTRINI ANDREW·Filed 2011·Granted Feb 28, 2012·6 cites·10 claims
- 0272US7945373B2Method and apparatus for controlling an engine capable of operating on more than one type of fuelAM GENERAL LLC·Filed 2008·Granted May 17, 2011·9 cites·10 claims
- 0343US6244045B1Method of monitoring efficiency of a catalytic converter and a control system suitable for use in the methodLOTUS CAR·Filed 1998·Granted Jun 12, 2001·16 cites·14 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →