DH

Douglas Alan Hahn

IT Illinois Bell Telephone: 2 patents #3 of 13Top 25%
SP Sbc Properties: 2 patents #77 of 280Top 30%
AT AT&T: 1 patents #10,626 of 18,772Top 60%
🗺 Illinois: #17,877 of 84,256 inventorsTop 25%
Overall (All Time): #1,026,497 of 4,157,543Top 25%
5
Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
7853005 Web-based network monitoring tool Bruce Lee Leatherman 2010-12-14
7197131 Web-based network monitoring tool Bruce Lee Leatherman 2007-03-27
6970552 Web-based network monitoring tool Bruce Lee Leatherman 2005-11-29
5369680 Pro-active billing and routing test set William F. Borbas, Thomas W. Mines 1994-11-29
4937850 Programmable automatic call-thru set William F. Borbas, Robert D. Hahn 1990-06-26