SB

Stephen P. Birkeland

3M: 3 patents #4,214 of 11,543Top 40%
📍 White Bear Lake, MN: #217 of 561 inventorsTop 40%
🗺 Minnesota: #19,064 of 52,454 inventorsTop 40%
Overall (All Time): #1,681,858 of 4,157,543Top 45%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
4455076 Film supply cassette for camera processor 1984-06-19
D271113 Chemical container Noboru Sawamura 1983-10-25
4222902 Semiconductive and sensitized photoconductive compositions William A. Huffman, Kevin P. O'Leary 1980-09-16