RD

Ralph R. Day

Caterpillar: 2 patents #2,982 of 8,398Top 40%
📍 Aurora, IL: #421 of 1,049 inventorsTop 45%
🗺 Illinois: #34,584 of 84,256 inventorsTop 45%
Overall (All Time): #2,359,768 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4474080 Differential with variable torque means — 1984-10-02
4296917 Contoured cable roller B. James Wulff 1981-10-27