Inventor · Copenhagen, DK

Ingemar J. Cox

70Patents
30h-index
22Co-inventors
88Inventor score

Filing activity: Jan 30, 1991 → Oct 28, 2019

Most-cited inventions

PatentTitleAreaCited byStatus
US5930369A Secure spread spectrum watermarking for multimedia data Electricity 666 Expired
US5915027A Digital watermarking Electricity 618 Expired
US5848155A Spread spectrum watermark for embedded signalling Electricity 442 Expired
US6332194A Method for data preparation and watermark insertion Physics 280 Expired
US6069914A Watermarking of image data using MPEG/JPEG coefficients Electricity 262 Expired
US7058223B2 Identifying works for initiating a work-based action, such as an action on the internet Emerging Cross-Sectional Technologies 254 Expired
US6154571A Robust digital watermarking Electricity 250 Expired
US5359362A Videoconference system using a virtual camera image Electricity 240 Expired
US6208735A Secure spread spectrum watermarking for multimedia data Physics 214 Expired
US5363305A Navigation system for a mobile robot Physics 208 Expired
US5991426A Field-based watermark insertion and detection Electricity 182 Expired
US6282300A Rotation, scale, and translation resilient public watermarking for images using a log-polar fourier transform Electricity 168 Expired
US5696964A Multimedia database retrieval system which maintains a posterior probability distribution that each item in the database is a target of a search Emerging Cross-Sectional Technologies 132 Expired
US6278792A Robust digital watermarking Electricity 129 Expired
US8010988B2 Using features extracted from an audio and/or video work to obtain information about the work Electricity 123 Active
US8205237B2 Identifying works, using a sub-linear time search, such as an approximate nearest neighbor search, for initiating a work-based action, such as an action on the internet Electricity 118 Active
US6539475B1 Method and system for protecting digital data from unauthorized copying Electricity 106 Expired
US6108434A Counteracting geometric distortions for DCT based watermarking Physics 104 Expired
US6510234B1 Method for increasing the functionality of a media player/recorder device Electricity 101 Expired
US7216232B1 Method and device for inserting and authenticating a digital signature in digital data Electricity 96 Expired
US8020187B2 Identifying works, using a sub linear time search or a non exhaustive search, for initiating a work-based action, such as an action on the internet Electricity 94 Active
US6834345B2 Method for data preparation and watermark insertion Physics 74 Expired
US6996249B2 Applying informed coding, informed embedding and perceptual shaping to design a robust, high-capacity watermark Physics 71 Expired
US5383013A Stereoscopic computer vision system Electricity 66 Expired
US6738493B1 Robust digital watermarking Electricity 56 Expired

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.