To analyze the patenting strengths of Illinois, this Policy Update looks beyond a more typical analysis of aggregate number or per-capita utility patents, known as "patents for inventions," to examine the considerations that inventors and businesses face when seeking patents. Although most patent analyses focus on broad trends, patenting is not equally important or advantageous across all industries or types of inventions. Inventors face a complex set of decisions when deciding whether to patent their work. This update explores patenting activity in two of the state's areas of patenting strength: Computer and Peripheral Equipment (C&PE) and Basic Chemicals (BC). These two industries face distinctly different considerations when applying for patents. Even within these particular industries, patenting can vary among firms for a number of reasons, many of which are unrelated to an invention's innovative potential. This limits the usefulness of using patents as a standalone measure of innovation.