Ralph S. Allen, III

📍 Grand Haven, MI: #6 of 20 inventorsTop 30%

🗺 Michigan: #694 of 3,452 inventorsTop 25%

Overall (1989): #68,165 of 140,708Top 50%

Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4861481	Multi-functional filtering medium	—	1989-08-29