Robert F. Dray

📍 Dallas, TX: #69 of 304 inventorsTop 25%

🗺 Texas: #885 of 4,134 inventorsTop 25%

Overall (1989): #63,802 of 140,708Top 50%

Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4842414	Mixing device for a feed screw	—	1989-06-27