Darrell G. Knoch

📍 Escanaba, MI: #11 of 35 inventorsTop 35%

🗺 Michigan: #35,034 of 86,293 inventorsTop 45%

Overall (All Time): #2,348,702 of 4,157,543Top 60%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
4596288	Heat recovery device for exhaust flues	—	1986-06-24
4550772	Heat recovery device for exhaust flues	—	1985-11-05