RL

Roy D. Lister

EI Eagle-Picher Industries: 4 patents #6 of 101Top 6%
AM Amoco: 1 patents #610 of 1,251Top 50%
UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 Fort Worth, TX: #324 of 2,247 inventorsTop 15%
🗺 Texas: #21,377 of 125,132 inventorsTop 20%
Overall (All Time): #737,497 of 4,157,543Top 20%
7
Patents All Time

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDate
8955691 Spiral ramp hydrocyclone 2015-02-17
5185087 Method of concentrating and deodorizing ruminant waste Sabino Cortez 1993-02-09
4857197 Liquid separator with tangential drive fluid introduction Grant A. Young, William D. Wakley, Steven L. Andrews 1989-08-15
4818400 Cyclone and filter belt apparatus for dewatering Robert G. Russell 1989-04-04
4786412 Hydrocyclone having dewatering tube Tommy J. Derrington 1988-11-22
4765887 System for joining sections of a hydrocyclone separator 1988-08-23
4324438 Drilling deck bushing 1982-04-13