Inventor · disambiguated record
Joachim S. Hammerschmidt
Also filed as: HAMMERSCHMIDT JOACHIM · HAMMERSCHMIDT JOACHIM S
54 granted patents·10 pending applications·322 citations·filing 2001–2024
98Inventor score
Top patents by PatentIndex Score
64 records- 0198US10171129B1Pulse shaping interoperability protocol for ultra wideband systemsAPPLE INC·Filed 2017·Granted Jan 1, 2019·40 cites·20 claims
- 0297US10567034B2Time instant reference for ultra wideband systemsAPPLE INC·Filed 2018·Granted Feb 18, 2020·26 cites·20 claims
- 0396US7831220B2Methods and systems for calibrating for gain and phase imbalance and local oscillator feed-throughBROADCOM CORP·Filed 2006·Granted Nov 9, 2010·38 cites·54 claims
- 0494US12015916B2Signaling techniques using fragmented and multi-partitioned UWB packetsAPPLE INC·Filed 2021·Granted Jun 18, 2024·4 cites·20 claims
- 0594US11995929B2Scheduled access control for an electronic lockAPPLE INC·Filed 2022·Granted May 28, 2024·3 cites·20 claims
- 0694US11184153B2Ultra wideband secure rangingAPPLE INC·Filed 2019·Granted Nov 23, 2021·10 cites·20 claims
- 0793US11991107B2Techniques for hybridized ultra-wideband and narrowband signalingAPPLE INC·Filed 2021·Granted May 21, 2024·3 cites·20 claims
- 0893US11815616B2Announcing UWB / NBA-UWB-MMS ranging rounds via narrowband-based advertisementsAPPLE INC·Filed 2021·Granted Nov 14, 2023·2 cites·20 claims
- 0993US7535972B2Programmable transmitterBROADCOM CORP·Filed 2005·Granted May 19, 2009·27 cites·22 claims
- 1091US7860174B2Method and apparatus for frequency domain compensation of DC offset in an orthogonal frequency division multiplexing systemAGERE SYSTEMS INC·Filed 2005·Granted Dec 28, 2010·24 cites·22 claims
- 1189US11757488B2Next-generation ultra-wideband frame formatsAPPLE INC·Filed 2022·Granted Sep 12, 2023·2 cites·20 claims
- 1287US10602397B2Real-time relay of wireless communicationsAPPLE INC·Filed 2017·Granted Mar 24, 2020·5 cites·16 claims
- 1387US8290450B2Methods and systems for calibrating for gain and phase imbalance and local oscillator feed-throughHAMMERSCHMIDT JOACHIM·Filed 2010·Granted Oct 16, 2012·12 cites·10 claims
- 1485US10638250B2Systems and methods for determining estimated head orientation and position with ear piecesAPPLE INC·Filed 2017·Granted Apr 28, 2020·5 cites·48 claims
- 1584US7813374B2Multiple protocol wireless communication baseband transceiverBROADCOM CORP·Filed 2006·Granted Oct 12, 2010·13 cites·20 claims
- 1682US11729037B2Sequences for ultra-wideband rangingAPPLE INC·Filed 2021·Granted Aug 15, 2023·1 cites·20 claims
- 1782US7526705B2Acknowledgement message modification in communication networksAGERE SYSTEMS INC·Filed 2005·Granted Apr 28, 2009·9 cites·12 claims
- 1881US11171685B2System and method for pulse shaping interoperability for ultra wideband systemsAPPLE INC·Filed 2020·Granted Nov 9, 2021·1 cites·20 claims
- 1981US10924303B2Secure training sequence symbol structureAPPLE INC·Filed 2019·Granted Feb 16, 2021·3 cites·20 claims
- 2080US12323354B2Techniques for hybridized ultra-wideband and narrowband signalingAPPLE INC·Filed 2024·Granted Jun 3, 2025·0 cites·20 claims
- 2178US12307841B2Scheduled access control for an electronic lockAPPLE INC·Filed 2024·Granted May 20, 2025·0 cites·20 claims
- 2278US7096041B2Beam forming methodSIEMENS AG·Filed 2001·Granted Aug 22, 2006·21 cites·18 claims
- 2378US2025175211A1Next-Generation Ultra-Wideband Frame FormatsAPPLE INC·Filed 2024·Application pending·0 cites
- 2477US12176942B2Next-generation ultra-wideband frame formatsAPPLE INC·Filed 2023·Granted Dec 24, 2024·0 cites·20 claims
- 2576US12442888B2Announcing UWB / NBA-UWB-MMS ranging rounds via narrowband-based advertisementsAPPLE INC·Filed 2023·Granted Oct 14, 2025·0 cites·20 claims
- 2676US10944156B2Wireless earphone antennasAPPLE INC·Filed 2017·Granted Mar 9, 2021·2 cites·20 claims
- 2776US7895495B2Acknowledgement message modification in communication networksAGERE SYSTEMS INC·Filed 2009·Granted Feb 22, 2011·5 cites·17 claims
- 2875US11864025B2Real-time relay of wireless communicationsAPPLE INC·Filed 2022·Granted Jan 2, 2024·0 cites·20 claims
- 2974US8149971B2Multiple-branch wireless receiverHAMMERSCHMIDT JOACHIM S·Filed 2011·Granted Apr 3, 2012·3 cites·20 claims
- 3072US8369388B2Single-chip wireless tranceiverBROADCOM CORP·Filed 2007·Granted Feb 5, 2013·5 cites·33 claims
- 3172US7400609B2Partitioning scheme for an OFDM transceiverAGERE SYSTEMS INC·Filed 2003·Granted Jul 15, 2008·16 cites·20 claims
- 3271US7356322B2Multiple-branch wireless receiverAGERE SYSTEMS INC·Filed 2004·Granted Apr 8, 2008·10 cites·40 claims
- 3370US8194771B2Transmission method and apparatus in a multiple antenna communication systemHAMMERSCHMIDT JOACHIM S·Filed 2004·Granted Jun 5, 2012·13 cites·19 claims
- 3469US7684479B2Methods and systems for soft-bit demappingBROADCOM CORP·Filed 2006·Granted Mar 23, 2010·3 cites·16 claims
- 3567US11412409B2Real-time relay of wireless communicationsAPPLE INC·Filed 2020·Granted Aug 9, 2022·0 cites·20 claims
- 3666US8040843B2Transmit scheme adaptation for wireless data transmissionsBROADCOM CORP·Filed 2007·Granted Oct 18, 2011·3 cites·10 claims
- 3766US8031808B2Multiple-branch wireless receiverAGERE SYSTEMS INC·Filed 2008·Granted Oct 4, 2011·2 cites·30 claims
- 3865US11239881B2Next-generation ultra-wideband frame formatsAPPLE INC·Filed 2021·Granted Feb 1, 2022·0 cites·20 claims
- 3964US11043953B2Method and apparatus for calibration of voltage controlled oscillatorAPPLE INC·Filed 2020·Granted Jun 22, 2021·0 cites·20 claims
- 4063US7885324B2Methods and systems for soft-bit demappingBROADCOM CORP·Filed 2010·Granted Feb 8, 2011·1 cites·16 claims
- 4163US7876847B2Global minimum-based MLD demapping for soft-output MIMO detectionAGERE SYSTEMS INC·Filed 2005·Granted Jan 25, 2011·2 cites·20 claims
- 4263US7636401B2Methods and systems for soft-bit demappingBROADCOM CORP·Filed 2006·Granted Dec 22, 2009·2 cites·23 claims
- 4362US7542743B2Maximum likelihood detection for MIMO receiversBROADCOM CORP·Filed 2006·Granted Jun 2, 2009·2 cites·19 claims
- 4461US10880670B2Systems and methods for determining estimated head orientation and position with ear piecesAPPLE INC·Filed 2020·Granted Dec 29, 2020·0 cites·30 claims
- 4559US7583762B2Reduced-complexity multiple-input, multiple-output detectionAGERE SYSTEMS INC·Filed 2004·Granted Sep 1, 2009·4 cites·27 claims
- 4656US10887863B2Receiver for secure time-of-arrival calculationAPPLE INC·Filed 2020·Granted Jan 5, 2021·0 cites·20 claims
- 4754US11481224B2Digital filter with programmable impulse response for direct amplitude modulation at radio frequencyAPPLE INC·Filed 2019·Granted Oct 25, 2022·0 cites·20 claims
- 4854US2013177891A1Audio-visual learning systemHAMMERSCHMIDT JOACHIM·Filed 2012·Application pending·0 cites
- 4951US8730930B2Polling using B-ACK for occasional back-channel traffic in VoWIFI applicationsAGARWAL PEYUSH·Filed 2011·Granted May 20, 2014·0 cites·20 claims
- 5051US8009759B2Programmable transmitterBROADCOM CORP·Filed 2008·Granted Aug 30, 2011·0 cites·20 claims
Showing the top 50 of 64 patent records by PatentIndex Score.
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