My child is adopted.  He needed the sealed records opened.  He contacted a Lawyer and the seal was broken, however, the biological parents names, age etc. has been blacked out. To find a parent/child, both have to be searching.  I am not sure about all the States, but it seems to me, back in the 80's it became a law that after a child reaches a certain age, or for medical reasons the seals could be broken.  If you know someone that works in the Catholic Charaties who would be kind enough to look in the files, the information is also there.  That is however, very risky.  Good luck to you, and I hope you are satisfied with what you discover.  God bless