Inventor · disambiguated record
Ralf Keller
Also filed as: KELLER RALF
195 granted patents·58 pending applications·708 citations·filing 1997–2023
99Inventor score
Top patents by PatentIndex Score
253 records- 0193US10506499B2Indication of packet based voice support in a mobile network with different radio access technologiesERICSSON TELEFON AB L M·Filed 2013·Granted Dec 10, 2019·16 cites·15 claims
- 0291US12482875B2Motor vehicle traction battery arrangementPORSCHE AG·Filed 2022·Granted Nov 25, 2025·1 cites·7 claims
- 0391US9929389B2Battery device and method of production thereofPORSCHE AG·Filed 2016·Granted Mar 27, 2018·10 cites·17 claims
- 0490US11337139B2Enforcement of service exemption on a per access network technology typeERICSSON TELEFON AB L M·Filed 2019·Granted May 17, 2022·5 cites·13 claims
- 0590US8955271B2Sliding door assemblySTEELCASE INC·Filed 2013·Granted Feb 17, 2015·15 cites·11 claims
- 0689US9560517B2Method and apparatus for providing a service to a roaming UE via a packet data network gatewayERICSSON TELEFON AB L M·Filed 2015·Granted Jan 31, 2017·7 cites·25 claims
- 0789US8483182B1Single radio voice call continuity handover of calls with video media from a circuit switched access networkKELLER RALF·Filed 2012·Granted Jul 9, 2013·10 cites·22 claims
- 0888US11722936B2Communication establishmentERICSSON TELEFON AB L M·Filed 2022·Granted Aug 8, 2023·1 cites·14 claims
- 0988US11438831B2Network slicing awareness in IP multimedia subsystemERICSSON TELEFON AB L M·Filed 2018·Granted Sep 6, 2022·6 cites·16 claims
- 1088US10966269B2Support of circuit switched service in a 5G core networkERICSSON TELEFON AB L M·Filed 2016·Granted Mar 30, 2021·5 cites·23 claims
- 1188US9674750B2Handling of access capability information in a mobile networkERICSSON TELEFON AB L M (publ)·Filed 2016·Granted Jun 6, 2017·4 cites·19 claims
- 1288US8848666B2Handover of emergency calls from a circuit switched to a packet switched access networkKELLER RALF·Filed 2012·Granted Sep 30, 2014·9 cites·17 claims
- 1387US10652942B2Method and device for network initiated packet data unit, PDU, session establishment in a telecommunication networkERICSSON TELEFON AB L M·Filed 2018·Granted May 12, 2020·6 cites·18 claims
- 1487US10622606B2Energy store for a vehicle and method for providing an energy store for a vehiclePORSCHE AG·Filed 2015·Granted Apr 14, 2020·3 cites·6 claims
- 1587US10595250B2Quality of service initiated handoverERICSSON TELEFON AB L M·Filed 2017·Granted Mar 17, 2020·5 cites·26 claims
- 1687US9408113B2Methods of and nodes for selecting a target core network for handing over a voice session of a terminalERICSSON TELEFON AB L M (publ)·Filed 2016·Granted Aug 2, 2016·4 cites·11 claims
- 1786US11323922B2Managing user equipment roaming status changes in a radio access networkERICSSON TELEFON AB L M·Filed 2017·Granted May 3, 2022·5 cites·16 claims
- 1885US11284315B2Communication establishmentERICSSON TELEFON AB L M·Filed 2018·Granted Mar 22, 2022·3 cites·19 claims
- 1985US9078172B2Session transfer in a communication networkLINDHOLM FREDRIK·Filed 2011·Granted Jul 7, 2015·5 cites·13 claims
- 2085US8964961B2Method of routing a session from a calling party in a serving communication network of the calling party to a called partyKELLER RALF·Filed 2011·Granted Feb 24, 2015·6 cites·29 claims
- 2185US8392582B2Method and apparatuses for making use of virtual IMS subscriptions coupled with the identity of a non SIP compliant terminal for non-registered subscribersNOLDUS ROGIER·Filed 2006·Granted Mar 5, 2013·11 cites·5 claims
- 2284US11006309B2Network node, radio network node and methods performed thereinERICSSON TELEFON AB L M·Filed 2015·Granted May 11, 2021·4 cites·16 claims
- 2384US8315425B2Method for comparison of 3D computer model and as-built situation of an industrial plantAPPEL MIRKO·Filed 2008·Granted Nov 20, 2012·22 cites·13 claims
- 2482US11532849B2Battery module for a motor vehicle and method for the production thereofPORSCHE AG·Filed 2020·Granted Dec 20, 2022·1 cites·19 claims
- 2582US11323478B2User equipment containers and network slicesERICSSON TELEFON AB L M·Filed 2017·Granted May 3, 2022·3 cites·35 claims
- 2682US11217831B2Safety apparatus for a batteryPORSCHE AG·Filed 2019·Granted Jan 4, 2022·2 cites·16 claims
- 2782US8660091B2Handling call transfer in a communication networkLINDHOLM FREDRIK·Filed 2012·Granted Feb 25, 2014·4 cites·8 claims
- 2882US6496689B1Indication of charging information using the USSD mechanismERICSSON TELEFON AB L M·Filed 1999·Granted Dec 17, 2002·110 cites·20 claims
- 2980US9888409B2Session transfer in a communication networkERICSSON TELEFON AB L M·Filed 2015·Granted Feb 6, 2018·2 cites·2 claims
- 3080US8671201B2Correlation of sessions in case of session transfer in IMS domainKELLER RALF·Filed 2008·Granted Mar 11, 2014·9 cites·19 claims
- 3180US7996553B2Multi-user streamingERICSSON TELEFON AB L M·Filed 2003·Granted Aug 9, 2011·26 cites·16 claims
- 3279US12192860B2Short message service (SMS) deliveryERICSSON TELEFON AB L M·Filed 2020·Granted Jan 7, 2025·1 cites·26 claims
- 3379US11050799B2Methods and devices for registering a user equipment, UE, with low access priority in an internet protocol based multimedia subsystem, IMSERICSSON TELEFON AB L M·Filed 2017·Granted Jun 29, 2021·3 cites·16 claims
- 3479US9521590B2Multi-bearer connection controlERICSSON TELEFON AB L M·Filed 2014·Granted Dec 13, 2016·4 cites·27 claims
- 3578US11399315B2Efficient EPS fallback in a 5GS architectureERICSSON TELEFON AB L M·Filed 2018·Granted Jul 26, 2022·2 cites·5 claims
- 3678US8340084B2System and method for indicating circuit switched access at IMS registrationNAKADA KAZUHIKO·Filed 2007·Granted Dec 25, 2012·8 cites·13 claims
- 3777US8509120B2Preserving mid-call state in IMS centralized services sessionsSEDLACEK IVO·Filed 2010·Granted Aug 13, 2013·5 cites·21 claims
- 3877US8229408B2System and method for selecting a subsystem for call terminationKELLER RALF·Filed 2005·Granted Jul 24, 2012·7 cites·28 claims
- 3977US7180860B2Method and devices to provide a defined quality of service in a packet switched communication networkERICSSON TELEFON AB L M·Filed 2000·Granted Feb 20, 2007·30 cites·13 claims
- 4076US12022023B2Method and network node for home charging of offloaded traffic at visited networkERICSSON TELEFON AB L M·Filed 2021·Granted Jun 25, 2024·1 cites·20 claims
- 4176US9413561B2Routing terminating callsKELLER RALF·Filed 2011·Granted Aug 9, 2016·5 cites·19 claims
- 4276US9294964B2Handover delay optimizationKELLER RALF·Filed 2010·Granted Mar 22, 2016·3 cites·33 claims
- 4376US9106664B2Method and apparatuses for maintaining service continuity to a centralization and continuity application serverKELLER RALF·Filed 2008·Granted Aug 11, 2015·5 cites·21 claims
- 4476US8290654B2Method for interrupting the force flux in the drive train of a vehicle in the event of a crashBECKER JOERG·Filed 2010·Granted Oct 16, 2012·7 cites·4 claims
- 4575US9925856B2Arrangement in a motor vehiclePORSCHE AG·Filed 2016·Granted Mar 27, 2018·2 cites·11 claims
- 4675US8885603B2Handover of calls between access networksKELLER RALF·Filed 2012·Granted Nov 11, 2014·4 cites·13 claims
- 4774US11647476B2Device registration in a communications networkERICSSON TELEFON AB L M·Filed 2022·Granted May 9, 2023·0 cites·11 claims
- 4874US11523307B2Network repository function in 5GCERICSSON TELEFON AB L M·Filed 2017·Granted Dec 6, 2022·2 cites·14 claims
- 4974US11277775B2Single radio voice call continuity for 5GCERICSSON TELEFON AB L M·Filed 2017·Granted Mar 15, 2022·2 cites·31 claims
- 5074US10863560B2First network node, receiving network node and methods performed thereinERICSSON TELEFON AB L M·Filed 2015·Granted Dec 8, 2020·2 cites·13 claims
Showing the top 50 of 253 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Ralf Keller 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 →