Inventor · disambiguated record
Michael Kiefer
Also filed as: KIEFER MICHAEL · KIEFER MICHAEL G · KIEFER MICHAEL GEORGE
39 granted patents·22 pending applications·580 citations·filing 2004–2025
98Inventor score
Top patents by PatentIndex Score
61 records- 0199US9621522B2Systems and methods for playing back alternative streams of protected content protected using common cryptographic informationSONIC IP INC·Filed 2015·Granted Apr 11, 2017·39 cites·15 claims
- 0299US9247311B2Systems and methods for playing back alternative streams of protected content protected using common cryptographic informationSONIC IP INC·Filed 2014·Granted Jan 26, 2016·54 cites·19 claims
- 0398US11683542B2Systems and methods for distributing content using a common set of encryption keysDIVX LLC·Filed 2020·Granted Jun 20, 2023·6 cites·14 claims
- 0498US10341698B2Systems and methods for distributing content using a common set of encryption keysDIVX LLC·Filed 2018·Granted Jul 2, 2019·20 cites·20 claims
- 0598US10244272B2Systems and methods for playing back alternative streams of protected content protected using common cryptographic informationDIVX LLC·Filed 2017·Granted Mar 26, 2019·21 cites·30 claims
- 0698US10225588B2Playback devices and methods for playing back alternative streams of content protected using a common set of cryptographic keysDIVX LLC·Filed 2018·Granted Mar 5, 2019·23 cites·24 claims
- 0798US9798863B2Federated digital rights management scheme including trusted systemsSONIC IP INC·Filed 2015·Granted Oct 24, 2017·36 cites·32 claims
- 0898US8918636B2Systems and methods for protecting alternative streams in adaptive bitrate streaming systemsKIEFER MICHAEL GEORGE·Filed 2011·Granted Dec 23, 2014·76 cites·38 claims
- 0998US8909922B2Systems and methods for playing back alternative streams of protected content protected using common cryptographic informationKIEFER MICHAEL GEORGE·Filed 2011·Granted Dec 9, 2014·68 cites·31 claims
- 1097US11886545B2Federated digital rights management scheme including trusted systemsDIVX LLC·Filed 2020·Granted Jan 30, 2024·4 cites·28 claims
- 1197US10856020B2Systems and methods for distributing content using a common set of encryption keysDIVX LLC·Filed 2019·Granted Dec 1, 2020·14 cites·20 claims
- 1297US9184920B2Federated digital rights management scheme including trusted systemsSONIC IP INC·Filed 2014·Granted Nov 10, 2015·40 cites·18 claims
- 1396US8656183B2Federated digital rights management scheme including trusted systemsGRAB ERIC WILLIAM·Filed 2012·Granted Feb 18, 2014·36 cites·18 claims
- 1495US10878065B2Federated digital rights management scheme including trusted systemsDIVX LLC·Filed 2017·Granted Dec 29, 2020·9 cites·19 claims
- 1593US9343112B2Systems and methods for supplementing content from a serverSONIC IP INC·Filed 2013·Granted May 17, 2016·46 cites·36 claims
- 1689US10933764B2Converter configuration for an electricity charging station and corresponding electricity charging stationPORSCHE AG·Filed 2018·Granted Mar 2, 2021·8 cites·8 claims
- 1789US8757187B2Load-absorbent device for introducing load forces such as cable forces or tensioning forces of sheet-like structuresKIEFER MICHAEL·Filed 2009·Granted Jun 24, 2014·15 cites·9 claims
- 1883US12470781B2Federated digital rights management scheme including trusted systemsDIVX LLC·Filed 2023·Granted Nov 11, 2025·0 cites·20 claims
- 1983US9721071B2Binding of cryptographic content using unique device characteristics with server heuristicsCHAN FRANCIS YEE-DUG·Filed 2011·Granted Aug 1, 2017·8 cites·26 claims
- 2082US12244878B2Systems and methods for distributing content using a common set of encryption keysDIVX LLC·Filed 2023·Granted Mar 4, 2025·0 cites·36 claims
- 2180USD923563SApparatus for charging accumulatorsPORSCHE AG·Filed 2019·Granted Jun 29, 2021·19 cites·1 claims
- 2279US10974612B2Use of two DC/DC controllers in the power electronics system of a charging station or electricity charging stationPORSCHE AG·Filed 2018·Granted Apr 13, 2021·3 cites·5 claims
- 2379US10923785B2Charging station for an electricity charging station having an underground cooling arrangementPORSCHE AG·Filed 2018·Granted Feb 16, 2021·3 cites·8 claims
- 2479US10457153B2Charging station system for electric vehicles with interconnections between power and cooling main componentsPORSCHE AG·Filed 2018·Granted Oct 29, 2019·4 cites·8 claims
- 2579US2025168426A1Systems and Methods for Distributing Content Using a Common Set of Encryption KeysDIVX LLC·Filed 2025·Application pending·0 cites
- 2678US10759293B2Galvanic isolation in the power electronics system in a charging station or electricity charging stationPORSCHE AG·Filed 2018·Granted Sep 1, 2020·3 cites·5 claims
- 2774USD922943SApparatus for charging accumulatorsPORSCHE AG·Filed 2019·Granted Jun 22, 2021·14 cites·1 claims
- 2874US9648086B2System, method, and computer program product for providing test logic to user devicesSONIC IP INC·Filed 2013·Granted May 9, 2017·3 cites·20 claims
- 2970US10994626B2Charging plug for a charging column and charging column having such a plugPORSCHE AG·Filed 2019·Granted May 4, 2021·2 cites·8 claims
- 3067US8938625B2Systems and methods for securing cryptographic data using timestampsGRAB ERIC WILLIAM·Filed 2012·Granted Jan 20, 2015·2 cites·13 claims
- 3165US11305661B2Modular charging station for electric automobilesPORSCHE AG·Filed 2019·Granted Apr 19, 2022·1 cites·10 claims
- 3262US10527401B2Sensor and method for identifying a mechanical deformation of a housing of a charging columnPORSCHE AG·Filed 2018·Granted Jan 7, 2020·1 cites·13 claims
- 3362US8602368B2Load-adsorbing device for introducing load forces, in particular cable forcesKIEFER MICHAEL·Filed 2009·Granted Dec 10, 2013·2 cites·6 claims
- 3456US11468149B2Device authentication in collaborative content screeningVERANCE CORP·Filed 2019·Granted Oct 11, 2022·0 cites·6 claims
- 3554US2015160924A1Methods, Systems, and Media for Generating Random NumbersSONIC IP INC·Filed 2013·Application pending·0 cites
- 3654US2015200995A1Methods, systems, and media for providing an entropy sourceSONIC IP INC·Filed 2013·Application pending·0 cites
- 3752US10696172B2Charging station for electric automobiles having a removable and/or folding hoodPORSCHE AG·Filed 2018·Granted Jun 30, 2020·0 cites·17 claims
- 3852US10641816B2Current conduction element and system for insulation monitoringPORSCHE AG·Filed 2018·Granted May 5, 2020·0 cites·11 claims
- 3951US8807495B2Load-absorbing device for introducing load forces such as cable forces or tensioning forces of sheet-like structuresKIEFER MICHAEL·Filed 2009·Granted Aug 19, 2014·0 cites·31 claims
- 4047US10981461B2Method and device for electrically charging electric vehiclesPORSCHE AG·Filed 2018·Granted Apr 20, 2021·0 cites·17 claims
- 4147US2015002679A1System, method, and computer program product for providing test logic to user devicesSONIC IP INC·Filed 2013·Application pending·0 cites
- 4247US2015002680A1System, method, and computer program product for receiving and executing test logic at user devicesSONIC IP INC·Filed 2013·Application pending·0 cites
- 4347US2015160925A1Methods, Systems, and Media for Generating Random NumbersSONIC IP INC·Filed 2013·Application pending·0 cites
- 4445US2005027633A1Application and processes for the review and adjustment of the full lifecycle of consumer financesFiled 2004·Application pending·0 cites
- 4545US2014188937A1Systems, methods, and media for controlling access to media contentSONIC IP INC·Filed 2012·Application pending·0 cites
- 4644US2015117837A1Systems and methods for supplementing content at a user deviceSONIC IP INC·Filed 2013·Application pending·0 cites
- 4744US2013004142A1Systems and methods for device authentication including timestamp validationROVI CORP·Filed 2012·Application pending·0 cites
- 4843US2015096057A1Device Robustness FrameworkSONIC IP INC·Filed 2013·Application pending·0 cites
- 4943US2015189373A1Efficient channel surfing in a content distribution networkSONIC IP INC·Filed 2013·Application pending·0 cites
- 5041US11214155B2Device for charging at least one batteryPORSCHE AG·Filed 2018·Granted Jan 4, 2022·0 cites·20 claims
Showing the top 50 of 61 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Michael Kiefer files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →