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David A. Boelens

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

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

Overall (All Time): #2,340,223 of 4,157,543Top 60%

2 Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
D287654	Rotary drain cleaner	—	1987-01-06
4570281	Rotary drain cleaner	—	1986-02-18