Manufacturing Resources International v. Squires — Federal Circuit Affirms Samsung’s PTAB Win Over Display Cooling Patent

Background

Manufacturing Resources International, Inc. (MRI) owns U.S. Patent Nos. 8,854,595 and 9,173,322, both titled “Constricted Convection Cooling System for an Electronic Display.” The patents describe cooling systems for outdoor electronic displays that use a “constricted convection plate” to keep cool air flowing across the back of a hot display surface — a critical feature for signage and displays used in direct sunlight.

Samsung Electronics petitioned the Patent Trial and Appeal Board (PTAB) to institute inter partes reviews (IPRs) challenging MRI’s claims as obvious. Samsung argued that two prior-art references — Kim (U.S. Patent No. 7,800,706) and Na (unexamined Korean Patent Application Publication No. 10-2006-0016469) — disclosed the claimed constricted convection plate. The PTAB agreed, finding all challenged claims unpatentable as obvious and giving little weight to MRI’s objective indicia of non-obviousness due to a failure to establish nexus.

MRI appealed to the Federal Circuit. Samsung subsequently withdrew from the appeal, and USPTO Director Squires intervened to defend the Board’s decisions. This case (No. 24-2300, on appeal from IPR2023-00255) is the latest in a trio of related appeals. The Federal Circuit had already issued written opinions in companion cases Nos. 24-2228 (decided March 31, 2026) and 24-2224 (decided April 7, 2026) affirming the PTAB’s findings on related patent claims.

The Court’s Holding

The Federal Circuit issued a Rule 36 summary affirmance — meaning it affirmed the PTAB’s decision without writing a separate opinion. Under Federal Circuit Rule 36, the court may enter judgment of affirmance without opinion when it determines that the lower tribunal’s decision is based on findings that are not clearly erroneous.

The Rule 36 disposition signals that the panel (Judges Prost, Clevenger, and Stark) found no reversible error in the PTAB’s determination that MRI’s display cooling claims were unpatentable as obvious over the Samsung-identified prior art. The companion written opinions in Nos. 24-2228 and 24-2224 provide the detailed reasoning for the court’s treatment of related claims from the same patent family.

Key Takeaways

• All challenged claims of MRI’s display cooling patents have now been cancelled through a series of PTAB decisions, all upheld by the Federal Circuit across three separate appeals.
• MRI’s “objective indicia” evidence of non-obviousness — including commercial success and industry praise — was given little weight because MRI failed to establish a sufficient nexus between that evidence and the specific claimed invention.
• The case illustrates the difficulty of defending patents covering incremental improvements to existing hardware when the individual components are disclosed in the prior art.

Why It Matters

This decision marks the final chapter in Samsung’s successful challenge to MRI’s display cooling patent portfolio. For companies in the outdoor digital signage industry, the case reinforces that patent claims on combinations of known cooling components may be vulnerable to obviousness challenges — even when the resulting product achieved market success. Patent holders asserting hardware combination patents should be prepared to prove a strong nexus between the specific claimed features and any secondary considerations like commercial success or industry recognition.