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Doug J. Birkholz

UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 Madison, WI: #2,790 of 4,527 inventorsTop 65%
🗺 Wisconsin: #23,834 of 40,088 inventorsTop 60%
Overall (All Time): #3,166,059 of 4,157,543Top 80%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
8480549 Versatile exercise bars and handles Robert S. Hinds, Glenn Polinsky, Ray Rollins, John Stephenson, Brandon Grayson Hall +1 more 2013-07-09