QUESTION: Can I buy a patented product add something to it and resell it ?
So a company has patented an item and I want to add an accessory to it to make it fancier can I buy it from them and add my touch and re sell it and also make it into my own business adding and reselling that product

ANSWER: If the terms of the sale do not include a restriction on resale, then you may alter the patented product for resale free of restriction from the patent.