There's really no way of telling. If the product is popular and successful, the value of the patent will reflect that.
Type your answer here... how much is Mason "Ascot" brown tea set worth?
50-200 usd
Depending on condition, ABOUT $200.
50-450 usd
It is a patent for an old lighter, invented by some Megill.
I have one also dated Dec 11th 1923. That is only the patent date, it could be many years newer then that. Mine dates from the 50's. I have no idea what it's worth either, but would like to know.
50-450 usd
Food Finds - 2000 Dallas Ft- Worth was released on: USA: 17 February 2004
Is there a patent office in the Fort Worth Texas area
Unknown. I've never seen a patent for sale.
If anyone finds a Kennedy DOLLAR it would be rare indeed because JFK only appears on the HALF dollar.
Needs a professional appraisal.