Darrell Fongson has been granted 4 US patents while listed as an inventor at Comdial . The first was granted in 2004 and the most recent in August 2015. Darrell Fongson ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Darrell Fongson in Saratoga, CA, US.
Patents per Year Patents granted per year, 2004 to 2015 Bar chart with a peak of 1 patents in 2004. peak 1 2004: 1 patents 2004 2006: 1 patents 2006 2012: 1 patents 2012 2015: 1 patents 2015
Issued Patents All Time
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Showing 1–4 of 4 patents
Patent # Title Co-Inventors Date
9106767 Systems and methods for information exchange and synchronization using DTMF over telephone communication channels Srivatsan Kasturi , G. Alagiri , Vinod Nagarajan , Rajah Kalipatnapu 2015-08-11
8098801 Systems and methods for information exchange and synchronization using DTMF over telephone communication channels Srivatsan Kasturi , G. Alagiri , Vinod Nagarajan , Rajah Kalipatnapu 2012-01-17
7088804 Systems and methods for information exchange and synchronization using DTMF over telephone communication channels Srivatsan Kasturi , Vinod Nagarajan , Rajah Kalipatnapu 2006-08-08
6771751 Systems and methods for information exchange and synchronization using DTMF over telephone communication channels Srivatsan Kasturi , G. Alagiri , Vinod Nagarajan , Rajah Kalipatnapu 2004-08-03