MINNEAPOLIS & REHOVOT, Israel--(BUSINESS WIRE)--Stratasys Ltd. (Nasdaq:SSYS), a leading global provider of 3D printing and additive manufacturing solutions, announced that the U.S. Patent Trial and Appeal Board (PTAB) of the United States Patent & Trademark Office (USPTO) has denied Afinia’s requests for inter partes review of three important FDM® technology patents directed to liquefier structure, temperature control, and tool paths for constructing part perimeters. Inter partes review is