JK

John B. Kiefl

📍 Ottawa, CA: #3,687 of 6,399 inventorsTop 60%
Overall (All Time): #3,762,397 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5382970 Television viewer monitoring system including portable data meter for each viewer — 1995-01-17