The U.S. Patent and Trademark Office’s Patent Trial and Appeal Board ruled in favor of LMK Technologies, declining inter partes reviews on two petitions filed by BLD Services. The patents at issue pertain to LMK’s T-Liner main-to-lateral CIPP connection lining with Insignia gasket-sealing technology and are the subject of pending district court litigation against BLD, the company announced. BLD unsuccessfully challenged the same claims with earlier IPR petitions.