NB

Norman P. Butler

📍 San Diego, CA: #15,630 of 23,606 inventorsTop 70%
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Overall (All Time): #3,756,365 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5571411 Magnetic attachment for filtering oil James Cheng, Li K. Pui 1996-11-05