Peter Michaelis who is president and CEO of Windtech, LLC will probably be more than happy to explain the patent claim, filing and anything else about this windmill that someone has questions about. I've spoken with him and he is very personable, informative and has no axe to grind except for rights to HIS product. All you need to do is go to www.windmillpower.com , call the phone number and ask him yourself. RH