Paul R. Johnston

📍 Washington, PA: #11 of 27 inventorsTop 45%

🗺 Pennsylvania: #570 of 2,652 inventorsTop 25%

Overall (1982): #39,656 of 81,411Top 50%

Patents 1982

Issued Patents 1982

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4345769	Drilling head assembly seal	—	1982-08-24