Case: 24-1360 Document: 64 Page: 1 Filed: 12/11/2025

NOTE: This disposition is nonprecedential.

United States Court of Appeals for the Federal Circuit ______________________

CLANTECH, INC., MODERN FONT APPLICATIONS LLC, Appellants

v.

COSTAR REALTY INFORMATION, INC., DUOLINGO, INC., Appellees ______________________

2024-1360, 2024-1361 ______________________

Appeals from the United States Patent and Trademark Office, Patent Trial and Appeal Board in Nos. IPR2022- 00799, IPR2022-00800. ______________________

JUDGMENT ______________________

ANDREW TIMOTHY OLIVER, Amin Turocy & Watson, LLP, San Jose, CA, argued for all appellants.

INGE A. OSMAN, Latham & Watkins LLP, Washington, DC, argued for appellees. Also represented by GABRIEL K. BELL, ASHLEY M. FRY. Case: 24-1360 Document: 64 Page: 2 Filed: 12/11/2025

JAMES C. WATSON, TraskBritt, PC, Salt Lake City, UT, for appellant Clantech, Inc. ______________________

THIS CAUSE having been heard and considered, it is

ORDERED and ADJUDGED:

PER CURIAM (LOURIE, REYNA, and CUNNINGHAM, Cir- cuit Judges). AFFIRMED. See Fed. Cir. R. 36.

ENTERED BY ORDER OF THE COURT

December 11, 2025 Date