These are the local rules of practice for Patent Cases before the United States. District Court for the Eastern District of North Carolina.The purpose of this guide is to provide you with basic information about filing a utility patent application with the USPTO. The foramen ovale is a hole in the wall between the left and right atria of every human fetus. This hole allows blood to bypass the fetal lungs. There are two types of holes which can be present between the upper chambers of the heart: an Atrial septal defect (ASD) and a patent foramen ovale (PFO). The ductus arteriosus is a hole that allows the blood to skip the circulation to the lungs. We believe passionately in the power of an inclusive publishing environment, not only to do what is right, but to enrich, strengthen and advance us all. Charlotte, North Carolina. The extrahepatic bile duct was found to be patent without signs of obstruction or stenosis, with follow-up at 18 months. (Fig. 6). SpyGlass.