Donald R. Duke

SI Smith International: 1 patents #8 of 29Top 30%

📍 Spring, TX: #23 of 89 inventorsTop 30%

🗺 Texas: #1,330 of 5,527 inventorsTop 25%

Overall (1994): #141,462 of 165,921Top 90%

Patents 1994

Issued Patents 1994

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
5303785	Diamond back-up for PDC cutters	—	1994-04-19