This page provides information on the types of patents and types of patent applications, and the examination process. A flow reversal (or a hepatofugal flow) is seen in the case of portal hypertension (Fig. 6).This tutorial will focus on patents and the process for securing a patent in the U.S. First, let's consider why we have a patent system? The Patent Pro Bono Program supports solo inventors, non-profits, and small businesses. Below are links to the scanned pages of the Patent Indexes. These books do not contain actual patents, but serve as patentee name indexes. How to get a patent? • File a patent application with an invention that is novel, non-. Balloon maceration shows patent central SMV and portal veins (PVs) with hepatopetal flow. Residual, adherent thrombus is evident in SMV and PVs.