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USPTO Patent Rankings Data through Sept 30, 2025
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Gregory H. C. Stephan — 1 Patent

3M: 1 patents #7,233 of 11,543Top 65%
Stillwater, MN: #488 of 719 inventorsTop 70%
Minnesota: #32,449 of 52,454 inventorsTop 65%
Overall (All Time): #3,803,699 of 4,157,543Top 95%
1 Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5336405 Filter cartridge end cap assembly Yuan-Ming Tang 1994-08-09