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Bass and Spangenberg double down on IPR strategy

Michael Loney, New York

Hedge fund manager Kyle Bass and IP Nav’s Erich Spangenberg have filed a second inter partes review petition against a patent owned by Acorda Therapeutics, as part of a strategy BIO said had “opened a new door to abuse of the US patent system”

Bass, who runs Texas-based Hayman Capital, announced in January that he would take on some of the world’s biggest drug producers by challenging their patents through inter partes review (IPR) proceedings at the Patent Trial and Appeal Board (PTAB).

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