DH

Douglas Alan Hahn

IT Illinois Bell Telephone: 1 patents #1 of 3Top 35%
🗺 Illinois: #1,021 of 4,484 inventorsTop 25%
Overall (1994): #141,291 of 165,921Top 90%
1
Patents 1994

Issued Patents 1994

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5369680 Pro-active billing and routing test set William F. Borbas, Thomas W. Mines 1994-11-29