A set of nine seamless pattern swatches for Adobe Illustrator by SergeyPoluse. You can use them for background design brainstorming or for creating pop-art design elements...

To use, load the PDF file with Adobe Illustrator (use the "File>Open" method, not Click+Drag), bring up the swatches palette (Window>Swatches), select an object with the Direct selection tool and choose a pattern for your Fill color.
This resource has been released under CC Attribution-Noncommercial 3.0 License. Download