http://www.nolo.com/products/how-to-make-patent-drawings-DRAW.html
How to Make Patent Drawings
Patent drafting made easy!
David Pressman, Attorney and Jack Lo, Patent Agent
August 2011, 6th Edition
Create your own patent drawings!
- make design or utility patent drawings
- utilize pen and paper, or digital equipment
- learn official patent drawing guidelines
- respond to USPTO regarding drawings