The USPTO TTAB has declared a default judgment in the trademark opposition case between Light & Wonder, Inc. (Plaintiff) and Caelum Inc. (Defendant) concerning the mark "DUO FU DUO SHOU." The proceeding, docketed as TTAB91304268, indicates that the defendant failed to respond, leading to this default determination.

This action signifies a significant development in the opposition proceeding, likely resulting in the cancellation or denial of Caelum Inc.'s trademark application for "DUO FU DUO SHOU." Legal professionals involved in trademark disputes should note the implications of default judgments and the importance of timely responses to TTAB filings. No specific compliance deadline is mentioned, as this is an adjudication of a dispute rather than a rule imposing new obligations.