Inventor · disambiguated record
David Joseph Robertson
Also filed as: ROBERTSON DAVID J · ROBERTSON DAVID JOSEPH
13 granted patents·100 citations·filing 1977–2022
90Inventor score
Files withZIXCORP SYSTEMS INC6NORTHERN TELECOM LTD3AMPEX1BAUCKMAN DENA TERRY1ROBERTSON DAVID JOSEPH1
Top patents by PatentIndex Score
13 records- 0175US12429096B2Joint assembly and method of manufacturing thereofROLLS ROYCE PLC·Filed 2022·Granted Sep 30, 2025·1 cites·16 claims
- 0275US10411902B2Authenticating a system based on a certificateZIXCORP SYSTEMS INC·Filed 2016·Granted Sep 10, 2019·3 cites·24 claims
- 0375US9509683B2Multi-factor authenticationZIXCORP SYSTEMS INC·Filed 2015·Granted Nov 29, 2016·3 cites·20 claims
- 0473US8984605B2Multi-factor authenticationBAUCKMAN DENA TERRY·Filed 2011·Granted Mar 17, 2015·6 cites·19 claims
- 0573US4140896AElectronic digital tape timerAMPEX·Filed 1977·Granted Feb 20, 1979·16 cites·23 claims
- 0670US9602473B2Secure message forwarding with sender controlled decryptionROBERTSON DAVID JOSEPH·Filed 2012·Granted Mar 21, 2017·6 cites·55 claims
- 0768US5027345ADigital key telephone systemNORTHERN TELECOM LTD·Filed 1988·Granted Jun 25, 1991·27 cites·45 claims
- 0866US4893310ADigital key telephone systemNORTHERN TELECOM LTD·Filed 1988·Granted Jan 9, 1990·25 cites·16 claims
- 0965US11102192B2Harvesting and distributing a certificate based on a DNS nameZIXCORP SYSTEMS INC·Filed 2018·Granted Aug 24, 2021·1 cites·19 claims
- 1045US10834071B2Harvesting and distributing a certificate based on a DNS nameZIXCORP SYSTEMS INC·Filed 2018·Granted Nov 10, 2020·0 cites·20 claims
- 1144US4873682ADigital key telephone systemNORTHERN TELECOM LTD·Filed 1987·Granted Oct 10, 1989·12 cites·11 claims
- 1243US10708238B2Encrypted push message viewing systemZIXCORP SYSTEMS INC·Filed 2017·Granted Jul 7, 2020·0 cites·23 claims
- 1337US10567357B2Secure transmission system with upgraded encryption strengthZIXCORP SYSTEMS INC·Filed 2015·Granted Feb 18, 2020·0 cites·24 claims
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