CompanyCompetitive AnalysisCompany Patent Opposition Analysis

Explore patent oppositions filed by Chang against competitors, revealing strategic technology disputes and market positioning. Monitor opposition details, timelines, and disputed innovations to understand competitive dynamics and IP enforcement strategy.

Last updated on: Aug 21, 2025
Patent NumberTitleApplicantOpposition Date

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Lubricating OilGREEN FRIXJan 14, 2021
Lubricating OilGREEN FRIXJan 14, 2021
Device For Electrically Processing A Fatty Substance Of Plant OriginGREEN FRIXJan 8, 2021
Manufacturing Process Of Shoe With Internally Waterproofed Fabric UpperCALZATURIFICIO MODA ITALIANADec 1, 2017

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: Aug 21, 2025
Patent NumberGrant DateTitleTotal Oppositions
Feb 21, 2024Bio-Based Meg And Polyester Fiber Compositions And Methods Of Making The Same2
Oct 19, 2022Method Of Recycling And Processing Waste Battery1
Jun 1, 2022Power Tool System And Battery Pack Thereof1
Sep 4, 2019Machine Head Transmission Device Of Warp Knitting Machine1
Jul 31, 2019The Use Of Dna Sequences Encoding An Interferon As Vaccine Adjuvants1
May 15, 2019Crankshaft And Connecting Rod Mechanism Of Needle Bed Of Warp Knitting Machine With Single Needle Bed1
Apr 10, 2019Sinker Crankshaft And Connecting Rod Mechanism Of Warp Knitting Machine With Single Needle Bed1
Nov 22, 2017Polyvinyl Alcohol And Purification Method Thereof1

Top competitors of Chang

Top competitors of Chang based on patent oppositions.