Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Nicholas Duffield — 55 Patents

ATAT&T: 55 patents #194 of 18,772Top 2%
UMUniversity of Minnesota: 1 patents #1,216 of 2,951Top 45%
WARF: 1 patents #1,912 of 4,123Top 50%
Summit, NJ: #8 of 570 inventorsTop 2%
New Jersey: #760 of 69,400 inventorsTop 2%
Overall (All Time): #45,454 of 4,157,543Top 2%
55 Patents All Time
Nicholas Duffield has been granted 55 US patents while listed as an inventor at AT&T. The first was granted in 2001 and the most recent in January 2019. Nicholas Duffield ranks #45,454 of 4,157,543 US inventors in our database (top 1.1%). Patent records list Nicholas Duffield in Summit, NJ, US.

Issued Patents All Time

Showing 1–25 of 55 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
10192547 System and method for customized voice response 2019-01-29 $41,238,000
9860181 System and method for inferring traffic legitimacy through selective impairment Balachander Krishnamurthy 2018-01-02 $33,152,000
9680877 Systems and methods for rule-based anomaly detection on IP network flow Patrick Haffner, Balachander Krishnamurthy, Haakon Andreas Ringberg 2017-06-13 $26,990,000
9571366 Method and apparatus for detecting and localizing an anomaly for a network Paul Barford, Amos Ron, Joel Sommers 2017-02-14 $26,779,000
9407527 System and method for inferring traffic legitimacy through selective impairment Balachander Krishnamurthy 2016-08-02 $37,984,000
9349102 Scalable traffic classifier and classifier training system Subhabrata Sen, Patrick Haffner, Jeffrey Erman, Yu Jin 2016-05-24 $29,086,000
9343063 System and method for customized voice response 2016-05-17 $33,927,000
9258217 Systems and methods for rule-based anomaly detection on IP network flow Patrick Haffner, Balachander Krishnamurthy, Haakon Andreas Ringberg 2016-02-09 $35,886,000
9116958 Methods and apparatus to sample data connections Graham Cormode, Edith Cohen 2015-08-25 $18,239,000
9106550 System and method for inferring traffic legitimacy through selective impairment Balachander Krishnamurthy 2015-08-11 $26,650,000
8935188 Method and apparatus for classifying applications using the collective properties of network traffic in a traffic activity graph Patrick Haffner, Yu Jin, Subhabrata Sen, Zhi-Li Zhang 2015-01-13 $20,725,000
8811395 System and method for determination of routing information in a network Alexandre Gerber, Lee Breslau, Subhabrata Sen, Carsten Lund, Cheng Ee +1 more 2014-08-19 $10,940,000
8804565 Multicast-based inference of temporal loss characteristics in packet data networks Vijay Arya, Darryl Neil Veitch 2014-08-12 $12,920,000
8751431 System and method for inferring traffic legitimacy through selective impairment Balachaner Krishnamurthy 2014-06-10 $14,143,000
8730807 Systems, methods, and devices for monitoring networks Christopher J. Chase, Albert Greenberg, Oliver Spatscheck, Jacobus Van der Merwe, Neal A. Shackleton 2014-05-20 $12,696,000
8477772 System and method for determination of routing information in a network Alexandre Gerber, Lee Breslau, Subhabrata Sen, Carsten Lund, Cheng Ee +1 more 2013-07-02 $18,340,000
8442827 System and method for customized voice response 2013-05-14 $26,859,000
8311956 Scalable traffic classifier and classifier training system Subhabrata Sen, Patrick Haffner, Jeffrey Erman, Yu Jin 2012-11-13 $37,782,000
8233402 Multicast-based inference of temporal loss characteristics in packet data networks Vijay Arya, Darryl Neil Veitch 2012-07-31 $48,295,000
8228818 Systems, methods, and devices for monitoring networks Christopher J. Chase, Albert Greenberg, Oliver Spatscheck, Jacobus Van der Merwe, Neal A. Shackleton 2012-07-24 $33,502,000
8218451 Methods and apparatus for detection of hierarchical heavy hitters Carsten Lund, Subhabrata Sen, Yin Zhang, Sumeet Singh 2012-07-10 $35,013,000
8195710 Method for summarizing data in unaggregated data streams Edith Cohen, Haim Kaplan, Carsten Lund, Mikkel Thorup 2012-06-05 $27,787,000
8165019 Indirect measurement methodology to infer routing changes using statistics of flow arrival processes Lee Breslau, Amogh Dhamdhere, Cheng Ee, Alexandre Gerber, Carsten Lund +1 more 2012-04-24 $23,206,000
8121599 System and method for inferring wireless trajectories in a cellular telephone network Alexandre Gerber, Robert P. Manzo, William Gregory RAMIREZ 2012-02-21 $53,556,000
8073945 Method and apparatus for providing a measurement of performance for a network Joel Sommers, Paul Barford, Amos Ron 2011-12-06 $27,034,000