Beware of someone calling from a place called Universal Manufacturing Corp saying they are interested in licensing your patent. Red flags went up immediately for me, but I decided to play along to see where they were headed until I got the ultimate red flag: give us thousands of dollars for us to license your product.
Their website is universalmanufacturingcorp.com and you will see such obvious mistakes where reverse image searches of "products" on their site are incredibly wrong: such as something listed as a OBDM Monitor that is a vacuum or the "timing diagnostics set" which is just an MP3 player link for a car.
Their current website is almost an exact clone of one for Global Express Manufacturing (globalexpressmfginc.com), so they are either copying the con, or changing their name to start over. The Universal Manufacturing Corp URL was registered via a anonymous proxy registrar just last February.
When they miraculously called us back to say the creative team picked our product (which I predicted weeks earlier to my wife because the scam doesn't work unless they pick our product) we turned them down after they started asking for money. They keep calling, but we are not answering.