In the early 1990's the Federal Communications Commission (FCC) allowed using three of the ISM bands for unlicensed communication equipment.
Yes but the regulations do not allow operation of home built transmitters in these bands, all transmitters must be "type approved" it is only the operation that does not require a license.
So let's see if the OP has got any balls.
Email the FCC with what you are proposing to do and see what they say.