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 data will be shared with the EPO. 1  CPC replaces ECLA on Espacenet, Patent Information News issue 4/2012, December 2012, p. 4.  2 The Cooperative Patent Classification Introduction to the CPC. EPO. 2013.  3 CPC Scheme and Definitions. EPO & USPTO. 2013. 4  Kisliuk, Bruce (September 27, 2012).