RD

Roger O. Durham

📍 Glendale, CA: #87 of 1,191 inventorsTop 8%
🗺 California: #50,852 of 386,348 inventorsTop 15%
Overall (All Time): #428,580 of 4,157,543Top 15%
12
Patents All Time

Issued Patents All Time

Showing 1–12 of 12 patents

Patent #TitleCo-InventorsDate
5954007 Catamaran for sailing and rowing 1999-09-21
5809844 Spacing ring for bicycle chainrings 1998-09-22
5702006 Workstand for bicycles 1997-12-30
5623856 Bicycle crank arm with internal flange 1997-04-29
5305654 Headset for bicycles with external forks 1994-04-26
4940340 Sealed ball bearing mechanism 1990-07-10
4840084 Freewheel mechanism for bicycles 1989-06-20
4758205 Derailleur mechanism for bicycles 1988-07-19
4728218 Locking key mechanism 1988-03-01
4704919 Two-piece crankshaft for bicycles 1987-11-10
4526558 Chain engagement slot for bicycle sprockets 1985-07-02
4373760 Drawbolt bearing support for bicycle pedals 1983-02-15