Mark R. Engel

DC Donaldson Company: 2 patents #358 of 695Top 55%

📍 Apple Valley, MN: #216 of 500 inventorsTop 45%

🗺 Minnesota: #23,881 of 52,454 inventorsTop 50%

Overall (All Time): #2,352,711 of 4,157,543Top 60%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
4549715	Apparatus for providing a gaseous pressure pulse	—	1985-10-29
4509960	Dust collector	—	1985-04-09