I sort of stumbled in to the wide world of patent drafting and illustrating. I think I'll stay for a while, I like it over here. I find the patent illustrations fun and cathartic. Every page of every case is different and has to be fit in to very specific parameters set by the Patent and Trademark Office. The USPTO requires that the drawings be only black and white and have reference numbers that correlate with the written text of the patent. If the drawings are not suitable the patent office may reject the entire patent. All those boundaries help keep me in line! (pun intended!)