MADISON, Wis. – The U.S. Patent and Trademark Office has upheld a second and a third University of Wisconsin-Madison patent covering embryonic stem cell research at the school.
In rulings made public Tuesday, Federal examiners confirmed two patents for scientist James Thomson’s work on isolating embryonic stem cells of primates and humans. The patent office last month upheld another patent stemming from the work, but that ruling can be appealed.