Epistar Corporation, filed a patent infringement complaint against LED lighting firm V-TAC USA Corp. Epistar filed the infringement complaint in the United States District Court for the Central District of California on May 7, 2018. The complaint alleges that V-TAC’s LED filament bulbs infringe seven Epistar patents. The lawsuit seeks an injunction to halt the further sale of the allegedly infringing products.
Epistar’s complaint asserts that the V-TAC’s LED filament bulbs including the VT-5100D Light Bulbs (P/N: 200), the VT-5115D Light Bulbs (P/N: 215), and VT-5133 Light Bulbs (P/N: 283) infringe one or more claims of Epistar’s U.S. Patent Numbers 9,664,340, titled “Light Emitting Device,” 9,488,321, titled “Illumination Device With Inclined Light Emitting Element Disposed On A Transparent Substrate,” 9,065,022, titled, “Light Emitting Apparatus,” 8,240,881, titled “Light Emitting Device Package,” 7,560,738, titled “Light-Emitting Diode Array Having An Adhesive Layer,” 7,489,068, titled “Light Emitting Device,” and 6,346,771, titled “High Power LED Lamp.”
In a statement about the lawsuit, Epistar pointed to its 4000 issued patents and pending patent applications and its millions of dollars invested to date in research and development into cutting edge LED technologies. The company further noted that as of May 8, 2018, its licensees include QLS, Supertrend, and Kaistar, whose LED filament bulb are licensed.