On Dec. 21, 2004, Geron Corp. reported that it received a U.S. stem cell patent for a technology that the company hopes could be used to develop a possible treatment for Parkinson's disease. Stock shares increased 7.6%. U.S. Patent No. 6,833,269 covers the production of human neural cells from human embryonic stem cells. Geron said the patent covers technology that can be used to produce dopaminergic neurons, or the dopamine-producing cells that are lost in Parkinson's disease.
Some of Geron's work has been with the University of Wisconsin (through WARF).