Darrell C. Crain

PP Phillips Petroleum: 1 patents #819 of 1,401Top 60%

📍 Sweeny, TX: #18 of 34 inventorsTop 55%

🗺 Texas: #73,555 of 125,132 inventorsTop 60%

Overall (All Time): #3,643,812 of 4,157,543Top 90%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
5878994	Gate valve	—	1999-03-09