David C. Herrera — 1 Patent at AT&T

David C. Herrera has been granted 1 US patent while listed as an inventor at AT&T. All of these patents were granted in 2011. David C. Herrera ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list David C. Herrera in Dallas, TX, US.

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Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
7907715	System and method for blocking a telephone call	John Wesley Moss, Wayne Robert Heinmiller, Dianna Tiliks, Tyler D. Schroepfer	2011-03-15	$18,760,000

David C. Herrera — 1 Patent

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