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

Gerald L. Knief — 5 Patents

RIRitchie Industries: 5 patents #1 of 11Top 10%
Grundy Center, IA: #1 of 11 inventorsTop 10%
Iowa: #3,091 of 15,303 inventorsTop 25%
Overall (All Time): #1,064,180 of 4,157,543Top 30%
5 Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
4646687 Animal waterer Jerry D. Peterson 1987-03-03
4633815 Waterer corner wear guard Jerry D. Peterson 1987-01-06
4248177 Animal waterer with recirculating water system Jerry D. Peterson 1981-02-03
D257691 Animal waterer Jerry D. Peterson 1980-12-23
4185589 Method and apparatus for heating a nipple valve livestock waterer Jerry D. Peterson 1980-01-29