Harry L. Johnston, Sr.

📍 Toledo, OH: #791 of 1,470 inventorsTop 55%

🗺 Ohio: #42,657 of 73,341 inventorsTop 60%

Overall (All Time): #4,121,895 of 4,157,543Top 100%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4228516	Computer for metric conversion	—	1980-10-14