Estech Systems IP LLC, a subsidiary of
Estech Systems, Inc. (Estech), has revived the litigation
campaign that Estech launched in April 2020, suing 99 Cent
Only Stores, Abbott Laboratories,
BMW, Carvana, Charles
Schwab, Conduent, Extra
Space, First American Financial
(Republic Title of Texas),
Fiserv, Liberty Mutual,
Marriott, McKesson,
Petco, Public Storage,
Primoris Services, Randstad,
SoFi, and Toyota in separate
Eastern District of Texas suits. The asserted patents are broadly
directed to various aspects of Voice over IP (VoIP) technology
(e.g., Caller ID, call quality monitoring, voicemail
systems, and phone directories), with the defendants accused of
infringement through the provision or use of VoIP products.
