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James D. Luedtke — 2 Patents

3M: 2 patents #5,326 of 11,543Top 50%

Windom, MN: #1,276 of 2,819 inventorsTop 50%

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

Overall (All Time): #2,240,912 of 4,157,543Top 55%

2 Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
RE36811	Solid phase extraction medium	Craig G. Markell, Donald F. Hagen	2000-08-08
5279742	Solid phase extraction medium	Craig G. Markell, Donald F. Hagen	1994-01-18