Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
DZ

David Zahn — 3 Patents

Alcatel Lucent: 2 patents #1,547 of 4,169Top 40%
ATAT&T: 1 patents #10,636 of 18,772Top 60%
Naperville, IL: #1,067 of 3,051 inventorsTop 35%
Illinois: #26,899 of 84,256 inventorsTop 35%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
David Zahn has been granted 3 US patents while listed as an inventor at AT&T. The first was granted in 2008 and the most recent in April 2012. David Zahn ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list David Zahn in Naperville, IL, US.

Patents per Year

Patents granted per year, 2008 to 2012Bar chart with a peak of 1 patents in 2008.peak 12008: 1 patents20082010: 1 patents20102012: 1 patents2012

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
8160220 Request to block use of remotely selected ring tone Gerald Pfleging, George Wilkin 2012-04-17 $1,697,000
7792264 Ring tone selected by calling party of third party played to called party Gerald Pfleging, George Wilkin 2010-09-07 $1,465,000
7388490 Methods and systems for locating VOIP terminals for improved 911 service Gregory A. Freitag, Gerald Pfleging, George Wilkin 2008-06-17