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USPTO Patent Rankings Data through Dec 31, 2025
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David Schrenk — 2 Patents

UNUnknown: 3 patents #7,366 of 83,584Top 9%
DUDuracell: 1 patents #120 of 239Top 55%
LaGrange, GA: #65 of 194 inventorsTop 35%
Georgia: #13,801 of 35,610 inventorsTop 40%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
David Schrenk has been granted 2 US patents while listed as an inventor at Unknown. The first was granted in 1988 and the most recent in February 1995. David Schrenk ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list David Schrenk in LaGrange, GA, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5389913 Warning system for vehicles Ronald Boser, Vito Farinola, Bert Greenberg 1995-02-14
4791036 Anode conductor for alkaline cells Patrick E. Murphy 1988-12-13