IMO the patent really doesnt make much difference. Mark is going to sell tractors with or without it. If people bought the stock on the patent alone it would be more an issue. I bought stock here because Mark is a great salesman. He has been in sales since 1980. 30 years of experience in the sales market should trump this petty patent thing.
Copy and paste something from your "research" for all us to see that is leading you to your doubtful conclusions. Otherwise you sound like your trying create fear and panic. Show us something your looking at. Or can't you?