You don't say what 'stripping agent' has been used, nor do you identify what 'patio bricks' were stripped, and then you refer to tiles, which leaves me totally confused.
However, the short answer is that you're buggered. You cannot undo the havoc wreaked by acid-based cleaners used on paving products. This fact is mentioned over and over again on this site, in the hope that folk will read it before discovering for themselves just how awful can be the results, but there's nowt I can do for the poor sods who find this site when things have already gone awry.
Sorry, but you're lumbered with patchy brown.