Sonix Technology Co., Ltd. v. Publications International, Ltd.

Sonix’s patent describes a system and method for using a “graphical indicator” (matrix of small dots) to encode information on an object’s surface. It includes an “optical device” that can read the graphical indicator and output further information. In 2010, Sonix alleged that GeneralPlus’s children’s books using dot pattern technology infringed the patent. Following reexamination, the Patent Office confirmed the patentability of the asserted claims. Weeks later, GeneralPlus requested another ex parte reexamination, asserting that the combination of two patents would have led to a visually negligible indicator. The examiner confirmed patentability based on the declaration of an expert, specifically indicating that the combination of cited references did not disclose a visually-negligible graphical indicator. In 2013, Sonix alleged that Defendants infringed the asserted claims. Defendants’ initial contentions identified 28 claim limitations as indefinite. The list did not include the term “visually negligible.” The district court held that the claims were indefinite under 35 U.S.C. 112, reasoning that “visually negligible” is “purely subjective” and that the claim language did not provide guidance. The Federal Circuit reversed, holding that that the written description and prosecution history provide sufficient support to inform with reasonable certainty those skilled in the art of the scope of the invention. The court noted the examiner’s knowing allowance of claims based on the term “visually negligible,” plus the acceptance of the term by both parties’ experts. View "Sonix Technology Co., Ltd. v. Publications International, Ltd." on Justia Law