Tang competitive analysis

Explore Tang'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 9, 2026
Patent NumberPublication DateTitleTotal Oppositions
Sep 15, 2021Contact Lens With A Hydrophilic Layer1
Oct 28, 2020Contact Lens With A Hydrophilic Layer1
Apr 18, 2018Contact Lens With A Hydrophilic Layer1
Mar 15, 2017Emergency Passage Window For Railway Carriage1

Latest PTAB cases involving Tang

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

Last updated on: Jul 13, 2026
Proceeding NumberFiling DatePetitionerRespondentStatus

Get alerts for PTAB Cases involving Tang

IPR2024-00898May 8, 2024RECYCLED PLASTICS INDUSTRIESTANGENTTerminated-Settled
IPR2021-00637Mar 9, 2021HPTANGTerminated-Settled
IPR2020-01345Jul 22, 2020ABILITY OPTO ELECTRONICS TECHNOLOGYTANGTerminated-Settled
IPR2017-00566Jan 6, 2017FAMY CARETANG LIU ACHEAMPONGTerminated-Settled
IPR2017-00567Jan 6, 2017FAMY CARETANG LIU ACHEAMPONGTerminated-Settled
IPR2017-00568Jan 6, 2017FAMY CARETANG LIU ACHEAMPONGTerminated-Settled
IPR2017-00569Jan 6, 2017FAMY CARETANG LIU ACHEAMPONGTerminated-Settled
IPR2017-00570Jan 6, 2017FAMY CARETANG LIU ACHEAMPONGTerminated-Settled
IPR2017-00571Jan 6, 2017FAMY CARETANG LIU ACHEAMPONGTerminated-Settled
IPR2017-00576Jan 6, 2017TEVA PHARMACEUTICALSTANG LIU ACHEAMPONGTerminated

Peer Comparison New

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

Last updated on: Jul 9, 2026
CompanyOppositions FiledOppositions FacedPTAB Cases FiledPTAB Cases Faced
CRRC TANGSHAN - 2 - -
KNORR BREMSE SYSTEME FUR SCHIENENFAHRZEUGE34 - - -
SIEMENS129212 - -