JJ

James A. Johnanson

AT AT&T: 1 patents #10,626 of 18,772Top 60%
Overall (All Time): #3,651,126 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5910976 Method and apparatus for testing customer premises equipment alert signal detectors to determine talkoff and talkdown error rates Charles W. Berthoud 1999-06-08