KF

Kenneth Donald Frantzen

AL American Telephone And Telegraph Company, At&T Bell Laboratories: 1 patents #65 of 425Top 20%
📍 Winfield, IL: #1 of 7 inventorsTop 15%
🗺 Illinois: #802 of 3,813 inventorsTop 25%
Overall (1989): #88,922 of 140,708Top 65%
1
Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4811378 Toll fraud control Richard L. Else 1989-03-07