Inventor · Cambridge, MA, US

David Engberg

17Patents
10h-index
7Co-inventors
61Inventor score

Filing activity: Apr 8, 2003 → Aug 30, 2016

Most-cited inventions

PatentTitleAreaCited byStatus
US7353396B2 Physical access control Electricity 104 Expired
US7822989B2 Controlling access to an area Physics 65 Active
US7600129B2 Controlling access using additional data Electricity 59 Active
US7716486B2 Controlling group access to doors Physics 43 Active
US8015597B2 Disseminating additional data used for controlling access Electricity 32 Active
US8261319B2 Logging access attempts to an area Electricity 22 Active
US8171524B2 Physical access control Electricity 19 Active
US7966487B2 Communication-efficient real time credentials for OCSP and distributed OCSP Electricity 14 Active
US9158288B2 Logging access attempts to an area Electricity 11 Active
US9449443B2 Logging access attempts to an area Physics 11 Active
US9454671B2 Selective data transformation and access for secure cloud analytics Physics 9 Active
US9230375B2 Physical access control Physics 8 Active
US9292563B1 Cross-application data sharing with selective editing restrictions Physics 7 Active
US8707030B2 Distributed delegated path discovery and validation Electricity 6 Active
US9461828B2 Signature-efficient real time credentials for OCSP and distributed OCSP Electricity 5 Active
US9654298B2 Signature # efficient real time credentials for OCSP and distributed OCSP Electricity 3 Active
US8099603B2 Secure ID checking Electricity 1 Active

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