RH

Richard J. Hartzheim

EA E.I. Du Pont De Nemours And: 1 patents #4,343 of 8,010Top 55%
📍 Sheboygan, WI: #208 of 549 inventorsTop 40%
🗺 Wisconsin: #13,258 of 40,088 inventorsTop 35%
Overall (All Time): #1,558,319 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
7905446 Unwind and feed system for elastomeric thread 2011-03-15
7878447 Unwind and feed system for elastomeric thread 2011-02-01
5887322 Apparatus for splicing threadlines David R. Roland, Thomas W. Teerlink 1999-03-30