Inventor · disambiguated record
Carl D. Hefley
Also filed as: HEFLEY CARL D
3 granted patents·1 pending application·116 citations·filing 1993–2007
75Inventor score
Files withHEFLEY CARL D3
Top patents by PatentIndex Score
4 records- 0189US5406911ACam-on-crankshaft operated variable displacement engineFiled 1993·Granted Apr 18, 1995·77 cites·8 claims
- 0278US7270092B2Variable displacement/compression engineHEFLEY CARL D·Filed 2006·Granted Sep 18, 2007·12 cites·14 claims
- 0366US5335632AVariable compression internal combustion engineHEFLEY CARL D·Filed 1993·Granted Aug 9, 1994·27 cites·9 claims
- 0440US2007245992A1Variable Displacement/Compression EngineHEFLEY CARL D·Filed 2007·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →