Richard A. Rajkovich

📍 Aurora, MN: #3 of 11 inventorsTop 30%

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

Overall (All Time): #2,263,875 of 4,157,543Top 55%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
5803172	Mine shaft and adit closure apparatus and method	—	1998-09-08
5497829	Expansion foam borehole plug and method	—	1996-03-12