Fred Keller, Jr.

📍 Bethlehem, PA: #3 of 50 inventorsTop 6%

🗺 Pennsylvania: #313 of 3,759 inventorsTop 9%

Overall (1989): #27,834 of 140,708Top 20%

Patents 1989

Issued Patents 1989

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
4873207	Ceramic aggregate for roadway composition and method of producing same	—	1989-10-10
D300862	Building block	—	1989-04-25