DC

DONALD FREDERICK COFFMAN

SR Sram: 1 patents #120 of 220Top 55%
Overall (All Time): #2,410,840 of 4,157,543Top 60%
1
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Issued Patents All Time

Patent #TitleCo-InventorsDate
12291297 Height adjustable seat posts for bicycles RAFER CHAMBERS, CHRISTOPHER ERIC GOLKIEWICZ, CHI HUI SU, ALEX KYLE MCGEE, CHARLES DUNLAP 2025-05-06