Inventor · disambiguated record
James W. Heffel
Also filed as: HEFFEL JAMES W
2 granted patents·50 citations·filing 2001–2010
62Inventor score
Technology areasF02D
Files withUNIV CALIFORNIA2
Top patents by PatentIndex Score
2 records- 0188US6612269B2Apparatus and method for operating internal combustion engines from variable mixtures of gaseous fuelsUNIV CALIFORNIA·Filed 2001·Granted Sep 2, 2003·47 cites·88 claims
- 0272USRE42876EApparatus and method for operating internal combustion engines from variable mixtures of gaseous fuelsUNIV CALIFORNIA·Filed 2010·Granted Nov 1, 2011·3 cites·88 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →