Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Robert D. Bartelt — 5 Patents

UNUnknown: 5 patents #3,065 of 83,584Top 4%
Merton, WI: #3 of 4 inventorsTop 75%
Wisconsin: #9,126 of 40,088 inventorsTop 25%
Overall (All Time): #907,971 of 4,157,543Top 25%
5 Patents All Time
Robert D. Bartelt has been granted 5 US patents while listed as an inventor at Unknown. The first was granted in 1991 and the most recent in October 1999. Robert D. Bartelt ranks #907,971 of 4,157,543 US inventors in our database (top 21.8%). Patent records list Robert D. Bartelt in Merton, WI, US.

Patents per Year

Patents granted per year, 1991 to 1999Bar chart with a peak of 2 patents in 1992.peak 21991: 1 patents19911992: 2 patents19921993: 1 patents19931999: 1 patents1999

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
5967265 Self-leveling inclined lift device Michael R. Bruno 1999-10-19
5230405 Stairway chairlift device 1993-07-27
5147106 Reinforced vehicle rear gate with optional hydraulic operation William W. Belson, III, Michael R. Bruno, Robert Boyd 1992-09-15
5114120 Pivotable extravehicular equipment mounting system William W. Belson, III, Michael R. Bruno 1992-05-19
4991810 Adjustable support base for mobile vehicle hoist Terry A. Andrus, William W. Belson, III, Michael R. Bruno, Scott M. Moen, Joseph A. Popelka 1991-02-12