Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Robert Weihe — 4 Patents

SISchaeff Incorporated: 4 patents #2 of 4Top 50%
Sioux City, IA: #27 of 187 inventorsTop 15%
Iowa: #3,794 of 15,303 inventorsTop 25%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Robert Weihe has been granted 4 US patents while listed as an inventor at Schaeff Incorporated. The first was granted in 1995 and the most recent in April 1999. Robert Weihe ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Robert Weihe in Sioux City, IA, US.

Patents per Year

Patents granted per year, 1995 to 1999Bar chart with a peak of 1 patents in 1995.peak 11995: 1 patents19951996: 1 patents19961997: 1 patents19971999: 1 patents1999

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
5890563 Lift truck mast hose reeving system with chain guideway Isaac Avitan, Lev M. Bolotin 1999-04-06
D382573 Motor Drive Isaac Avitan 1997-08-19
5558174 Drive train assembly Isaac Avitan 1996-09-24
5478196 Method of handling stacks of baked goods trays Isaac Avitan, Lev M. Bolotin 1995-12-26