RE

Robert W. Evans

DS Dailey Petroleum Services: 1 patents #1 of 3Top 35%
📍 Leonidas, TX: #2 of 4 inventorsTop 50%
🗺 Texas: #1,517 of 5,943 inventorsTop 30%
Overall (1997): #86,286 of 185,788Top 50%
1
Patents 1997

Issued Patents 1997

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5624001 Mechanical-hydraulic double-acting drilling jar — 1997-04-29