DH

D. Frank Howeth

EA E.I. Du Pont De Nemours And: 1 patents #4,343 of 8,010Top 55%
📍 Dallas, TX: #4,358 of 7,543 inventorsTop 60%
🗺 Texas: #73,555 of 125,132 inventorsTop 60%
Overall (All Time): #3,800,066 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5322092 System for transfering used refrigerant from multiple small recovery cylinders to large shipping cylinder S. M. Tranchina 1994-06-21