Inventor · Arlington, MA, US

Christopher R. Wren

33Patents
10h-index
36Co-inventors
75Inventor score

Filing activity: Mar 7, 1997 → Sep 1, 2017

Most-cited inventions

PatentTitleAreaCited byStatus
US9148742B1 Proximity detection via audio Physics 141 Active
US8533266B2 User presence detection and event discovery Physics 137 Active
US6911995B2 Computer vision depth segmentation using virtual surface Electricity 63 Expired
US6680745B2 Videoconferencing method with tracking of face and dynamic bandwidth allocation Electricity 49 Expired
US8694593B1 Tools for micro-communities Electricity 41 Active
US7242421B2 Methods of establishing a communications link using perceptual sensing of a user's presence Electricity 40 Expired
US5906952A Single layer absorbent cable wrap Emerging Cross-Sectional Technologies 18 Expired
US8510381B1 Sharing electronic resources with users of nearby devices Physics 15 Active
US7359836B2 Hierarchical processing in scalable and portable sensor networks for activity recognition Physics 13 Active
US8149278B2 System and method for modeling movement of objects using probabilistic graphs obtained from surveillance data Physics 13 Active
US7542949B2 Determining temporal patterns in sensed data sequences by hierarchical decomposition of hidden Markov models Physics 9 Expired
US7619647B2 Context aware surveillance system using a hybrid sensor network Physics 9 Active
US8447516B1 Efficient proximity detection Electricity 7 Active
US7415164B2 Modeling scenes in videos using spectral similarity Physics 7 Active
US9449302B1 Generating personalized websites and newsletters Physics 7 Active
US8818049B2 Retrieving contact information based on image recognition searches Physics 6 Active
US8412512B1 Feed translation for a social network Physics 6 Active
US7302369B2 Traffic and geometry modeling with sensor networks Physics 5 Expired
US8401981B1 Triggering attract mode for devices using viewability conditions and detected proximity of human to device Emerging Cross-Sectional Technologies 5 Active
US9454665B1 Retrieving contact information based on image recognition searches Physics 4 Active
US8538742B2 Feed translation for a social network Physics 4 Active
US9811535B1 Creating social network groups Physics 3 Active
US9137194B1 Tools for micro-communities Electricity 3 Active
US7907781B2 System and method for determining geometries of scenes Physics 2 Active
US8694445B1 Triggering attract mode for devices using viewability conditions and detected proximity of human to device Emerging Cross-Sectional Technologies 2 Active

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