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Douglas A. Hamar

Portland, OR: #4,612 of 9,213 inventorsTop 55%

Oregon: #12,654 of 28,073 inventorsTop 50%

Overall (All Time): #2,369,803 of 4,157,543Top 60%

2 Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
4256205	Bicycle brake adjustment device	—	1981-03-17
4233772	Animated illustration for books and the like	—	1980-11-18