EK

Earl L. Koppen

UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 Seattle, WA: #14,120 of 21,776 inventorsTop 65%
🗺 Washington: #48,111 of 76,902 inventorsTop 65%
Overall (All Time): #4,044,432 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4483538 Tamperproof reusable bingo card Douglas E. Winters 1984-11-20