What kind of penalties should I expect when text about patents patents that expired in my products? (e.g. "This product is protected by Patent No. XXXX" -> This was true at one time, but not anymore, as the patent already expired)
My product is software. Do I have to pay a fee for each copy of the software sold?
And, what about the case where expired patents are used in versions of the software that, although old (let's say a newer version without the expired patents has been released), are still in use by clients?