Roger B. Johnston

📍 Lafayette, CA: #3 of 22 inventorsTop 15%

🗺 California: #3,049 of 13,957 inventorsTop 25%

Overall (1994): #75,230 of 165,921Top 50%

Patents 1994

Issued Patents 1994

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
5301436	Cartridge runout fixture	—	1994-04-12