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USPTO Patent Rankings Data through Dec 31, 2025
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Joe E Defenderfer — 1 Patent

TETekelec: 1 patents #98 of 199Top 50%
Apex, NC: #974 of 1,394 inventorsTop 70%
North Carolina: #26,774 of 45,564 inventorsTop 60%
Overall (All Time): #2,406,284 of 4,157,543Top 60%
1 Patents All Time
Joe E Defenderfer has been granted 1 US patent while listed as an inventor at Tekelec. All of these patents were granted in 2011. Joe E Defenderfer ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Joe E Defenderfer in Apex, NC, US.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
7933608 Methods, systems, and computer program products for providing presence gateway functionality in a telecommunications network Aziz A. Tejani, Richard E. Schaedler, Venkataramaiah Ravishankar, Larry Gene Slate, Patricia A. Baldwin +1 more 2011-04-26 $6,121,000