Controversies
Controversies tied to this brand in public sources. A listing is not a finding of fault.
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2021
Cisco files patent complaint against Estech
Lawsuit filed
Cisco Systems filed suit against Estech Systems alleging willful infringement of three Cisco patents related to VoIP, and sought declaratory relief concerning non-infringement.
Source excerpt
Cisco Systems Inc. filed suit against Estech Systems Inc. for the willful infringement of three of its patents relating to Voice over Internet Protocol (VoIP) on Thursday.
Additionally, the Eastern District of Texas complaint asks for declaratory relief concerning its non-infringement patents that are the subject of other Estech-initiated infringement litigation.