Inventor

Nicholas Duffield

Inventor

Summit, NJ, US

Overview

55→

Patents

2001–2019

Patent span

Electricity

Primary field (CPC H)

Patents· 55 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H04Lprimary

H04LTransmission of digital information, e.g. telegraphic communication60%

G06FElectric digital data processing9%

Y02DClimate change mitigation technologies in information and communication technologies [ict], i.e. information and communication technologies aiming at the reduction of their own energy use8%

G06QInformation and communication technology [ict] specially adapted for administrative, commercial, financial, managerial or supervisory purposes6%

G06NComputing arrangements based on specific computational models5%

H04MTelephonic communication5%

G10LSpeech analysis techniques or speech synthesis4%

H04QSelecting3%

H04WWireless communication networks1%

PatentTitleYear

10,192,547System and method for customized voice response2019 9,860,181'System and method for inferring traffic legitimacy through selective impairment'2018 9,680,877'Systems and methods for rule-based anomaly detection on IP network flow'2017 9,571,366'Method and apparatus for detecting and localizing an anomaly for a network'2017 9,407,527'System and method for inferring traffic legitimacy through selective impairment'2016 9,349,102'Scalable traffic classifier and classifier training system'2016 9,343,063'System and method for customized voice response'2016 9,258,217'Systems and methods for rule-based anomaly detection on IP network flow'2016 9,116,958'Methods and apparatus to sample data connections'2015 9,106,550'System and method for inferring traffic legitimacy through selective impairment'2015 8,935,188'Method and apparatus for classifying applications using the collective properties of network traffic in a traffic activity graph'2015 8,811,395'System and method for determination of routing information in a network'2014 8,804,565'Multicast-based inference of temporal loss characteristics in packet data networks'2014 8,751,431'System and method for inferring traffic legitimacy through selective impairment'2014 8,730,807'Systems, methods, and devices for monitoring networks'2014 8,477,772'System and method for determination of routing information in a network'2013 8,442,827'System and method for customized voice response'2013 8,311,956'Scalable traffic classifier and classifier training system'2012 8,233,402'Multicast-based inference of temporal loss characteristics in packet data networks'2012 8,228,818'Systems, methods, and devices for monitoring networks'2012 8,218,451'Methods and apparatus for detection of hierarchical heavy hitters'2012 8,195,710'Method for summarizing data in unaggregated data streams'2012 8,165,019'Indirect measurement methodology to infer routing changes using statistics of flow arrival processes'2012 8,121,599'System and method for inferring wireless trajectories in a cellular telephone network'2012 8,073,945'Method and apparatus for providing a measurement of performance for a network'2011 8,064,359'System and method for spatially consistent sampling of flow records at constrained, content-dependent rates'2011 8,031,599'Statistical, signature-based approach to IP traffic classification'2011 8,028,055'Optimal combination of sampled measurements'2011 8,005,949'Variance-optimal sampling-based estimation of subset sums'2011 8,005,010'Method and apparatus for providing performance measurement for a network tunnel'2011 8,001,601'Method and apparatus for large-scale automated distributed denial of service attack detection'2011 7,990,982'Methods and apparatus to bound network traffic estimation error for multistage measurement sampling and aggregation'2011 7,957,315'System and method for sampling network traffic'2011 7,953,020'Method for implementing and reporting one-way network measurements'2011 7,924,739'Method and apparatus for one-way passive loss measurements using sampled flow statistics'2011 7,898,976'Methods and apparatus for detection of hierarchical heavy hitters'2011 7,852,785'Sampling and analyzing packets in a network'2010 7,764,625'Algorithms and estimators for summarization of unaggregated data streams'2010 7,746,808'Algorithms and estimators for summarization of unaggregated data streams'2010 7,660,248'Statistical, signature-based approach to IP traffic classification'2010 7,630,949'System and method for inferring traffic legitimacy through selective impairment'2009 7,587,761'Adaptive defense against various network attacks'2009 7,574,506'Traffic matrix estimation method and apparatus'2009 7,536,455'Optimal combination of sampled measurements'2009 7,508,769'Consistent sampling for network traffic measurement'2009 7,437,385'Methods and apparatus for detection of hierarchical heavy hitters'2008 7,424,489'Methods and apparatus for space efficient adaptive detection of multidimensional hierarchical heavy hitters'2008 7,299,283'Apparatus for size-dependent sampling for managing a data network'2007 7,293,086'Traffic matrix estimation method and apparatus'2007 7,197,048'Virtual private network'2007 7,080,136'Method and apparatus for size-dependent sampling for managing a data network'2006 6,912,232'Virtual private network'2005 6,873,600'Consistent sampling for network traffic measurement'2005 6,452,933'Fair queuing system with adaptive bandwidth redistribution'2002 6,310,857'Method and apparatus for smoothing and multiplexing video data flows'2001

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2001–2009Patents assigned to AT & T CORP (13)· patent assignee history

2001–2009Based in Hoboken, NJ, US· patent location history

2006–2011Based in New York, NY, US· patent location history

2008–2019Based in Summit, NJ, US· patent location history

2009–2018Patents assigned to AT & T IP II LP (18)· patent assignee history

2010–2019Patents assigned to AT & T IP I LP (22)· patent assignee history

2010–2016Patents assigned to SEN SUBHABRATA (8)· patent assignee history

2011–2017Patents assigned to DUFFIELD NICHOLAS (14)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
AT & T IP I LP	22	2010–2019
AT & T IP II LP	18	2009–2018
DUFFIELD NICHOLASself	14	2011–2017
AT & T CORP	13	2001–2009
SEN SUBHABRATA	8	2010–2016

Locations

Location	Patents	Span
Summit, New Jersey, US	43	2008–2019
New York, New York, US	6	2006–2011
Hoboken, New Jersey, US	6	2001–2009