Jackson Walker Resolves Preliminary Injunction Request for Principal Lighting Group


Jackson Walker has resolved a patent infringement lawsuit filed by its client Principal Lighting Group, LLC (PLG). The suit was filed in the Central District of California (Los Angeles division) against The Sloan Company d/b/a SloanLED, alleging that SloanLED infringed PLG’s U.S. Patent Nos. 9,311,835, 9,851,054, and 10,024,501, each directed to light-emitting diode (LED) assemblies that can be used to retrofit commercial signs designed for use with fluorescent lamps.

Shortly after PLG filed its complaint, PLG filed a motion for preliminary injunction seeking to enjoin SloanLED from selling its PrismBEAM products as infringing PLG’s ’054 and ’501 Patents and competing with PLG’s Stik™ family of products covered by those patents.

After briefing and further proceedings on PLG’s request for preliminary injunction, PLG and SloanLED reached a resolution whereby SloanLED agreed to redesign its PrismBEAM product in view of the ’054 and ’501 Patents and license the ’835 Patent. The full joint statement of the parties can be found here.

Wasif Qureshi and Blake T. Dietrich at Jackson Walker represented PLG.


Meet Wasif

Wasif Qureshi has over 15 years of experience representing and counseling businesses from start-ups to Fortune 100 and other worldwide companies in various types of IP legal matters, including in over 200 patent litigation matters. His work has been nationally recognized. For example, Managing Intellectual Property describes Wasif as a “[skilled] patent litigator” and selected him to be on its “Outstanding IP Litigator” Shortlist, a recognition received by less than 100 of the top IP litigators in the country and less than 10 in Texas.

Meet Blake

Blake T. Dietrich has litigated over 50 patent cases and is well experienced in all phases of patent litigation. He has managed cases for numerous clients in various jurisdictions throughout the country. Blake has a strong electrical engineering and computer science background, with a degree summa cum laude in Applied Science & Technology from The George Washington University, from where he also received his law degree.