H.Amdt.466 - Amendment creates a "refund" program to eliminate the potential incentive for diverting Patent and Trade Office (PTO) revenue to non-PTO programs; applies a 50 percent discount to all searches for small entities; prohibits commercial searches that apply to classified matters; prevents commercial entities from performing searches when they have a financial interest or other conflict at stake; caps the search fee after the 6th year; and requires a joint PTO and Small Business Administration study regarding the effects of the fee structure on small entities.