Carl D. Hefley

📍 Burbank, CA: #472 of 2,041 inventorsTop 25%

🗺 California: #149,087 of 386,348 inventorsTop 40%

Overall (All Time): #1,589,207 of 4,157,543Top 40%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
7270092	Variable displacement/compression engine	—	2007-09-18
5406911	Cam-on-crankshaft operated variable displacement engine	—	1995-04-18
5335632	Variable compression internal combustion engine	—	1994-08-09