Telefonaktiebolaget LM Ericsson v. TCL Corp., No. 17-2381 (Fed. Cir. 2019)
Annotate this CaseEricsson’s 052 patent describes and claims a “direct conversion receiver” for wireless communication systems that may receive signals from systems that operate at different frequency bands. On inter partes review, the Patent Trial and Appeal Board found that all of the challenged claims are unpatentable on the ground of obviousness, 35 U.S.C. 103. The Federal Circuit affirmed, finding that substantial evidence established that a specific foreign publication is an available reference against the patent. The article at issue was published in a German periodical whose cover states the date “Mai/Juni” 1996, more than one year earlier than Ericsson’s filing date of July 1, 1997. While journal issue did not reach the UCLA library until October 1996, substantial evidence supports the ruling that it was accessible to the public in the May/June 1996 period. Substantial evidence also supports the finding that the article renders obvious the claim 18 “steps of generating a first oscillator signal and frequency dividing the first oscillator signal to generate the in-phase and quadrature oscillator signals prior to the step of mixing.”
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