Engenious Designs LLC, based in Louisburg, Kan., says its FYRFLY, DBL BARREL and PRPLHAZE ultraviolet flashlights and lamps used, among other things, in connection with rock and mineral examination and collection, don’t infringe on U.S. Patent No. 7,781,751, entitled “Portable Wavelength Transforming Converter for UV LEDs,” issued on Aug. 24, 2010. William G. Gardner II and…
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