Premkumar Thomas Devanbu has been granted 10 US patents while listed as an inventor at AT&T. The first was granted in 1998 and the most recent in January 2004. Premkumar Thomas Devanbu ranks #481,000 of 4,157,543 US inventors in our database (top 11.6%). Patent records list Premkumar Thomas Devanbu in North Plainfield, NJ, US.