Background
Smart Mobile Technologies LLC owns U.S. Patent No. 9,319,075, which concerns wireless devices using multiple Internet Protocol communication paths. After Smart Mobile sued Apple Inc. for infringement, Apple petitioned for inter partes review of claims 1-3 and 5, arguing that they were obvious over the Yegoshin and Bernard prior-art references.
The Patent Trial and Appeal Board construed “multiplexing signals” to mean “combining multiple signal streams into one.” Applying that construction, the Board found that Apple had not shown that Yegoshin or Bernard, alone or together, disclosed the multiplexing limitation. It therefore held that Apple failed to prove the challenged claims unpatentable.
The Court’s Holding
The Federal Circuit affirmed in a nonprecedential opinion. Incorporating its analysis from a related appeal involving patents from the same family, the court agreed that “multiplexing signals” means combining multiple signal streams into one, rather than Apple’s broader proposal encompassing switching signals sequentially over the same path.
The court also held that substantial evidence supported the Board’s finding that neither Yegoshin nor Bernard disclosed multiplexing signals under the proper construction. Apple’s additional arguments concerning the ’075 patent did not change that conclusion, so the court affirmed the Board’s determination that Apple failed to prove claims 1-3 and 5 unpatentable.
Key Takeaways
- “Multiplexing signals” requires combining multiple signal streams into one and does not broadly encompass sequential switching.
- Substantial evidence supported the Board’s finding that the asserted prior art did not disclose the properly construed limitation.
- The Federal Circuit affirmed the survival of claims 1-3 and 5 because Apple did not carry its burden of proving obviousness.
Why It Matters
The decision preserves the challenged claims of Smart Mobile’s ’075 patent and reinforces the significance of precise claim language when distinguishing signal multiplexing from switching or the use of multiple paths.
Although nonprecedential, the ruling also shows how the Federal Circuit may apply claim-construction and prior-art analysis consistently across related patents sharing a common specification.