As 3D printing technology improves, the potential for printing human organs is becoming a reality… but are human tissues and organs patentable under the law? The America Invents Act (AIA) clearly prohibits the patenting of any claim “directed to or encompassing a human organism.” The question becomes whether a 3D printing of tissues and/or organs constitutes a human organism. In the past, patents have issued for organisms that are “non-naturally occurring” such as a bacterium that breaks down crude oil. As technology improves this is sure to be a uncertain area of the law.