MD

Michael J. Dufresne

BI Bmc Industries: 4 patents #2 of 43Top 5%
📍 Inver Grove Heights, MN: #91 of 287 inventorsTop 35%
🗺 Minnesota: #15,886 of 52,454 inventorsTop 35%
Overall (All Time): #1,268,483 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
6537459 Method and apparatus for etching-manufacture of cylindrical elements LeRoy J. Lundblad 2003-03-25
6468439 Etching of metallic composite articles Donald A. Whitehurst, Paul D. Wyatt, Charles E. Ring, Jose F. Brenes, Bruce A. Finger +1 more 2002-10-22
6365057 Circuit manufacturing using etched tri-metal media Donald A. Whitehurst, Dennis D. Mattson, Paul D. Wyatt, Charles E. Ring, Jose F. Brenes +2 more 2002-04-02
6086773 Method and apparatus for etching-manufacture of cylindrical elements LeRoy J. Lundblad 2000-07-11