Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
DJ

David Johnsen

NONordco: 6 patents #9 of 74Top 15%
SESteiner Turf Equipment: 2 patents #6 of 11Top 55%
Milwaukee, WI: #325 of 2,770 inventorsTop 15%
Wisconsin: #6,037 of 40,088 inventorsTop 20%
Overall (All Time): #661,210 of 4,157,543Top 20%
8 Patents All Time

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDate
7070004 Robotic sod stacker Emanuel Hendriks, Mathias Marie Gerardus Hendriks, Johannes Hendriks, Wilhelmus Hendriks, Gerald Douglas +1 more 2006-07-04
7066277 Robotic sod stacker Emanuel Hendriks, Mathias Marie Gerardus Hendriks, Johannes Hendriks, Wilhelmus Hendriks, Gerald Douglas 2006-06-27
6863717 Plate handling system and a method of removing plates from rail ties William D. Straub, Bruce M. Boczkiewicz 2005-03-08
6832558 Riding rail tie plugging apparatus Robert M. Weber, Donald Christopher Noll, Leary C. Peterson 2004-12-21
6755135 Combined tie extractor and plate remover for rail maintenance William D. Straub, Bruce M. Boczkiewicz 2004-06-29
6622633 Railroad machine centering system William D. Straub, Bruce M. Boczkiewicz 2003-09-23
6095053 Bulk spike loading system Robert M. Weber, William D. Straub, Bruce M. Boczkiewicz 2000-08-01
5671679 Fully automatic, multiple operation rail maintenance apparatus William D. Straub, Bruce M. Boczkiewicz 1997-09-30