RK

Ralph O. Keen

📍 Roseville, MI: #62 of 206 inventorsTop 35%
🗺 Michigan: #35,034 of 86,293 inventorsTop 45%
Overall (All Time): #2,367,898 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4349955 Method of locking a male member to a female member — 1982-09-21
4252458 Locking self-aligning coupler and locking apparatus — 1981-02-24