JH

James Heffner

EA E.I. Du Pont De Nemours And: 1 patents #4,343 of 8,010Top 55%
📍 Aiken, SC: #123 of 359 inventorsTop 35%
🗺 South Carolina: #5,775 of 15,501 inventorsTop 40%
Overall (All Time): #2,237,601 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
D423889 Grass plunger — 2000-05-02
4586438 Borehole stemming with a column of liquefiable and/or vaporizable chunks of solid material David L. Coursen 1986-05-06