Assignee
CRRC QINGDAO SIFANG CO LTD
CN·94 granted patents·35 pending applications·27 citations·filing 2015–2024
Top patents by PatentIndex Score
129 records- 0183US11046336B2Chassis component of railway vehicle, and railway vehicleCRRC QINGDAO SIFANG CO LTD·Filed 2018·Granted Jun 29, 2021·3 cites·18 claims
- 0281US9758180B2Securing system for freight wagon and freight wagonCRRC QINGDAO SIFANG CO LTD·Filed 2015·Granted Sep 12, 2017·5 cites·18 claims
- 0379US10137539B2Welding clamping deviceCRRC QINGDAO SIFANG CO LTD·Filed 2015·Granted Nov 27, 2018·2 cites·9 claims
- 0476US10730145B2Beam structure and hybrid welding method thereofCRRC QINGDAO SIFANG CO LTD·Filed 2017·Granted Aug 4, 2020·3 cites·9 claims
- 0574US10518789B2Coupling assembly and rail vehicle having sameCRRC QINGDAO SIFANG CO LTD·Filed 2017·Granted Dec 31, 2019·2 cites·20 claims
- 0672US11130506B2Rail vehicleCRRC QINGDAO SIFANG CO LTD·Filed 2018·Granted Sep 28, 2021·2 cites·18 claims
- 0771US10011287B2Bogie for high-speed railway vehicleCRRC QINGDAO SIFANG CO LTD·Filed 2015·Granted Jul 3, 2018·2 cites·10 claims
- 0868US11225270B2Chassis component of railway vehicle, and railway vehicleCRRC QINGDAO SIFANG CO LTD·Filed 2018·Granted Jan 18, 2022·1 cites·20 claims
- 0968US10416222B2Detection method and system for pantograph arc based on train power supply systemCRRC QINGDAO SIFANG CO LTD·Filed 2015·Granted Sep 17, 2019·2 cites·9 claims
- 1067US11441050B2Electromagnetic shielding filler, electromagnetic shielding coating comprising the same, preparation method and use thereofCRRC QINGDAO SIFANG CO LTD·Filed 2018·Granted Sep 13, 2022·0 cites·10 claims
- 1164US9682714B2Switching circuit for implementing coupling at random end of trainCRRC QINGDAO SIFANG CO LTD·Filed 2015·Granted Jun 20, 2017·1 cites·9 claims
- 1263US2025196265A1Laser cladding repair method and apparatus for surface damage of part, and partCRRC QINGDAO SIFANG CO LTD·Filed 2024·Application pending·0 cites
- 1361US10196075B2Railway vehicle and axle box structure thereofCRRC QINGDAO SIFANG CO LTD·Filed 2015·Granted Feb 5, 2019·1 cites·14 claims
- 1459US2025305145A1Method and device for repairing damage on mounting surface of journal box bodyCRRC QINGDAO SIFANG CO LTD·Filed 2023·Application pending·0 cites
- 1559US2026028054A1Rail vehicle and low-vacuum rail vehicle systemCRRC QINGDAO SIFANG CO LTD·Filed 2023·Application pending·0 cites
- 1658US2025282006A1Welding structure, welding device and welding methodCRRC QINGDAO SIFANG CO LTD·Filed 2022·Application pending·0 cites
- 1757US12017539B2Voltage control method and apparatus, system, and maglev trainCRRC QINGDAO SIFANG CO LTD·Filed 2021·Granted Jun 25, 2024·0 cites·11 claims
- 1857US9744976B2Railway vehicle and axle box structure thereofCRRC QINGDAO SIFANG CO LTD·Filed 2015·Granted Aug 29, 2017·1 cites·9 claims
- 1956US10411503B2Motor train unit auxiliary power supply apparatusCRRC QINGDAO SIFANG CO LTD·Filed 2016·Granted Sep 10, 2019·1 cites·8 claims
- 2056US2023405704A1Electric resistance spot welding device and methodCRRC QINGDAO SIFANG CO LTD·Filed 2021·Application pending·0 cites
- 2155US10668934B2Roof component of railway vehicle, and railway vehicleCRRC QINGDAO SIFANG CO LTD·Filed 2018·Granted Jun 2, 2020·0 cites·20 claims
- 2255US2024316681A1Welding device for suppressing welding hot cracks, and welding systemCRRC QINGDAO SIFANG CO LTD·Filed 2022·Application pending·0 cites
- 2354US12569933B2Laser stitch welding device and welding method thereforCRRC QINGDAO SIFANG CO LTD·Filed 2020·Granted Mar 10, 2026·0 cites·8 claims
- 2454US12168465B2Gearbox for rail vehicle, bogie for rail vehicle and rail vehicleCRRC QINGDAO SIFANG CO LTD·Filed 2020·Granted Dec 17, 2024·0 cites·20 claims
- 2554US11142223B2Side wall component of railway vehicle, and railway vehicleCRRC QINGDAO SIFANG CO LTD·Filed 2018·Granted Oct 12, 2021·0 cites·19 claims
- 2653US12163863B2Detection system for suspension system of maglev trainCRRC QINGDAO SIFANG CO LTD·Filed 2022·Granted Dec 10, 2024·0 cites·10 claims
- 2753US11916215B2Power supply battery and power supply system for high-speed maglev trainsCRRC QINGDAO SIFANG CO LTD·Filed 2020·Granted Feb 27, 2024·0 cites·13 claims
- 2853US11718182B2Railway vehicle with aerodynamic lift control deviceCRRC QINGDAO SIFANG CO LTD·Filed 2020·Granted Aug 8, 2023·0 cites·11 claims
- 2953US11447159B2Interior decoration structure and railway vehicle with interior decoration structureCRRC QINGDAO SIFANG CO LTD·Filed 2018·Granted Sep 20, 2022·0 cites·15 claims
- 3052US11827251B2Rail vehicle and bogieCRRC QINGDAO SIFANG CO LTD·Filed 2021·Granted Nov 28, 2023·0 cites·16 claims
- 3152US11142227B2Side wall component of railway vehicle, and railway vehicleCRRC QINGDAO SIFANG CO LTD·Filed 2018·Granted Oct 12, 2021·0 cites·15 claims
- 3250US12319322B2Bogie framework of rail vehicle and bogieCRRC QINGDAO SIFANG CO LTD·Filed 2020·Granted Jun 3, 2025·0 cites·16 claims
- 3350US11807281B2Cab roof structure, cab and rail trainCRRC QINGDAO SIFANG CO LTD·Filed 2019·Granted Nov 7, 2023·0 cites·19 claims
- 3450US11738782B2Activation control method and apparatus for railway trainCRRC QINGDAO SIFANG CO LTD·Filed 2018·Granted Aug 29, 2023·0 cites·10 claims
- 3550US11302947B2Membrane electrode assembly of fuel cell and preparation method thereforCRRC QINGDAO SIFANG CO LTD·Filed 2018·Granted Apr 12, 2022·0 cites·11 claims
- 3650US11052774B2Rail transit braking energy recovery system and hybrid power rail transitCRRC QINGDAO SIFANG CO LTD·Filed 2017·Granted Jul 6, 2021·0 cites·8 claims
- 3750US2020299894A1Nickel-Plated Carbon Fiber Film, Manufacturing Method of Nickel-Plated Carbon Fiber Film, Shielding Structure and Preparation Method of Shielding StructureCRRC QINGDAO SIFANG CO LTD·Filed 2018·Application pending·0 cites
- 3849US11447165B2Train window structure and train with train window structureCRRC QINGDAO SIFANG CO LTD·Filed 2017·Granted Sep 20, 2022·0 cites·16 claims
- 3949US11331865B2Method for producing a hollow support from a fiber composite material, core designed as a hollow body, use of said core, and use of said hollow support made from fiber compositeCRRC QINGDAO SIFANG CO LTD·Filed 2018·Granted May 17, 2022·0 cites·15 claims
- 4049US11230158B2Phase-change energy storage air duct and automobile air conditioning systemCRRC QINGDAO SIFANG CO LTD·Filed 2017·Granted Jan 25, 2022·0 cites·12 claims
- 4149US9809147B2Position-limiting deviceCRRC QINGDAO SIFANG CO LTD·Filed 2015·Granted Nov 7, 2017·1 cites·7 claims
- 4249US2024408706A1Apparatus for regulating welding deformation of box structure and regulation methodCRRC QINGDAO SIFANG CO LTD·Filed 2022·Application pending·0 cites
- 4348US12358539B2Linear motor for maglev train, and maglev trainCRRC QINGDAO SIFANG CO LTD·Filed 2021·Granted Jul 15, 2025·0 cites·14 claims
- 4448US12084815B2Switch for track of maglev trainCRRC QINGDAO SIFANG CO LTD·Filed 2019·Granted Sep 10, 2024·0 cites·14 claims
- 4548US11964443B2Method for connecting a connection piece to a u-shaped ring anchor for a head module for rail vehiclesCRRC QINGDAO SIFANG CO LTD·Filed 2018·Granted Apr 23, 2024·0 cites·18 claims
- 4648US11554675B2Maglev train and moving part thereofCRRC QINGDAO SIFANG CO LTD·Filed 2018·Granted Jan 17, 2023·0 cites·18 claims
- 4748US11254335B2Bogie of a rail vehicle with at least two wheelsets mounted in axleboxes and at least one transverse memberCRRC QINGDAO SIFANG CO LTD·Filed 2017·Granted Feb 22, 2022·0 cites·16 claims
- 4847US12337884B2Positioning system and method for maglev trainCRRC QINGDAO SIFANG CO LTD·Filed 2022·Granted Jun 24, 2025·0 cites·9 claims
- 4947US11780507B2Composite material vehicle body and composite material laying structure and laying methodCRRC QINGDAO SIFANG CO LTD·Filed 2020·Granted Oct 10, 2023·0 cites·7 claims
- 5047US10822001B2Rail vehicle lighting deviceCRRC QINGDAO SIFANG CO LTD·Filed 2016·Granted Nov 3, 2020·0 cites·14 claims
Showing the top 50 of 129 patent records by PatentIndex Score.
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