Michel Vounatsos, Biogen CEO (Dina Rudick/The Boston Globe via Getty Images)

Bio­gen los­es an­oth­er bid to re­vive Tec­fidera patent as gener­ic keeps eat­ing in­to block­buster sales

When Bio­gen lost its ap­peal to re­vive a key patent for Tec­fidera last No­vem­ber, the big biotech filed for a re­hear­ing in a last-ditch ef­fort …

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