IP Verse

Chang competitive analysis

Latest oppositions filed by Chang

Explore patent oppositions filed by Chang against competitors, revealing strategic technology disputes and market positioning.

Last updated on: Jul 30, 2026
Patent NumberTitleApplicantOpposition Date
EP3478806
Lubricating OilGREEN FRIXJan 14, 2021
EP3478807
Lubricating OilGREEN FRIXJan 14, 2021
EP3479660
Device For Electrically Processing A Fatty Substance Of Plant OriginGREEN FRIXJan 8, 2021
EP2952113
Manufacturing Process Of Shoe With Internally Waterproofed Fabric UpperCALZATURIFICIO MODA ITALIANADec 1, 2017

Latest patents of Chang opposed by its competitors

Explore Chang's recently opposed patents, revealing key competitive challenges and strategic patent disputes in the industry. Track oppositions filed by competitors to understand technology battlegrounds and assess potential risks.

Last updated on: Jul 30, 2026
Patent NumberPublication DateTitleTotal Oppositions
EP3660949
May 20, 2026Power Tool System And Battery Pack Thereof2
EP3538693
Feb 21, 2024Bio-Based Meg And Polyester Fiber Compositions And Methods Of Making The Same2
EP3269832
Oct 19, 2022Method Of Recycling And Processing Waste Battery1
EP3231913
Sep 4, 2019Machine Head Transmission Device Of Warp Knitting Machine1
EP2950816
Jul 31, 2019The Use Of Dna Sequences Encoding An Interferon As Vaccine Adjuvants1
EP3231914
May 15, 2019Crankshaft And Connecting Rod Mechanism Of Needle Bed Of Warp Knitting Machine With Single Needle Bed1
EP3231915
Apr 10, 2019Sinker Crankshaft And Connecting Rod Mechanism Of Warp Knitting Machine With Single Needle Bed1
EP3050905
Nov 22, 2017Polyvinyl Alcohol And Purification Method Thereof1

Latest PTAB cases involving Chang

Discover the latest PTAB cases involving Chang, highlighting their recent legal challenges and patent disputes.

Last updated on: Aug 4, 2026
Proceeding NumberFiling DatePetitionerRespondentStatus

Get alerts for PTAB Cases involving Chang

IPR2022-01267Jul 29, 2022ROKUCHANGTerminated-Settled
IPR2022-01268Jul 29, 2022ROKUCHANGTerminated-Settled
IPR2022-01269Jul 29, 2022ROKUCHANGTerminated-Settled
IPR2022-01112Jun 30, 2022ROKUCHANGTerminated-Settled
IPR2022-01113Jun 30, 2022ROKUCHANGTerminated-Settled
PGR2021-00112Sep 15, 2021ROKUCHANGTerminated-Settled
IPR2020-00239Dec 10, 2019ERICSSONCHANGTerminated-Settled
IPR2020-00241Dec 10, 2019ERICSSONCHANGTerminated-Settled
IPR2019-00866Mar 28, 2019UNIFIED PATENTSCHANGTerminated-Settled
IPR2017-00554Dec 30, 2016VOXXCHANGTerminated-Settled

Peer Comparison New

IP litigation analysis comparing Chang with top 3 competitors. Includes complete PTAB case data and opposition data from 2018 onwards.

Last updated on: Jul 30, 2026
CompanyOppositions FiledOppositions FacedPTAB Cases FiledPTAB Cases Faced
NANCHANG OCEAN PLASTIC1 - - -
CALZATURIFICIO MODA ITALIANA - 1 - -