Did Fujitsu Ltd. steal trade secrets by stealthily purchasing and inspecting a rival’s product? Thanks to a ruling issued on Friday, we’re one step closer to finding out.

In a 10-page decision, U.S. District Judge James Holderman in Chicago ruled that Tellabs Inc. and its legal team at Sidley Austin aren’t time-barred from pursuing their trade secrets theft claims, as well as related claims of unfair competition and business disparagement. While Tellabs’ allegations date way back to 2006, Holderman concluded that they’re shielded by a so-called savings clause in the relevant statute of limitations.