Chestnut Hill Sound Sues Apple for Patent Infringement." Yesterday Reuters reported that "Apple Inc on Wednesday won an appeals court ruling that likely finishes off a patent infringement case brought against it in 2015 by a small technology licensing company represented by Caldwell Cassady Curry, the law firm that has since obtained verdicts totaling more than $1 billion against the iPhone maker" – including the VirnetX case.

The report further noted that "The U.S. Court of Appeals for the Federal Circuit affirmed a Patent Trial and Appeal Board decision that invalidated a patent on digital audio technology owned by Chestnut Hill Sound Inc."

However, what's not known at this time is which one of the two patents was invalidated and, more importantly, will invalidating one of the patents be enough to kill the lawsuit against Apple?

Our 2015 report listed the two patents as being #8,090,309 entitled "Entertainment System with Unified Content Selection," and U.S. Patent Number 8,725,063 entitled "Multi-Mode Media Device Using Metadata to Access Media Content."

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