Wilfred B. Johnson

📍 Manistique, MI: #14 of 65 inventorsTop 25%

🗺 Michigan: #27,158 of 86,293 inventorsTop 35%

Overall (All Time): #1,679,995 of 4,157,543Top 45%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
4554894	Twin piston-per-cylinder engine	—	1985-11-26
4523519	Heating and cooling system using ground air	—	1985-06-18
4443990	Method of producing crack free logs	—	1984-04-24