Using Illustrator's Art Brushes, we're going to layer watercolor washes underneath black-and-white line art. This technique can be used with just about any kind of imagery however, including original artwork, clip art and silhouettes. Here, I've used a simple ink drawing on paper as a reference. Let's get started!
The Cooperative Patent Classification (CPC) is a patent classification system, which has been jointly developed by the European Patent Office (EPO) and the United States Patent and Trademark Office (USPTO).[1]
The International Patent Classification (IPC) is a hierarchical patent classification system used in over 100 countries to classify the content of patents in a uniform manner. It was created under the Strasbourg Agreement (1971), one of a number of treaties administered by the World Intellectual Property Organization (WIPO).