Hi, we don't need to reinvent the wheel. Go to the us patent office when you get there go to searching full text patents (since 1976) click on advanced search when you get there enter this in the search box CCl/451/383 this must be entered exactly as shown. Then change the date to 1790 to present. you will find about 100 patent drawings with descriptions. The patent office is the first place I go to for ideas and inspiration. I hope this helps.