Biogen wins latest battle in Tecfidera patent war

22 March 2017

The validity of US biotech Biogen’s (Nasdaq: BIIB) patent for its best-selling drug was upheld by the US Patent and Trademarks Office's Patent Trial and Appeal Board on Tuesday.

Hedge fund manager Kyle Bass had challenged the patent protecting the multiple sclerosis (MS) treatment Tecfidera (dimethyl fumarate), which earned Biogen $3.9 billion in revenue ‎ in 2016.

In the last quarter of the year, Biogen’s figures were affected negatively by a $455 million bill for Tecfidera (dimethyl fumarate) litigation settlement and license charges.

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