Really, MEDT didn't exist 4-5 years ago as a pub. co. so if you had restricted shares of SLVO from 4 or 5 years ago I would guess the resrictions wore off some time ago... way before my time and a whole different business model. Ask your broker or just look at your account to see if they are restricted... If you bought shares on or after May 23, 2008 then they certainly are free trading MEDT shares. I don't know if restricted shares of MEDT have ever been issued.
Mediatechnics Receives Approval From the NASDAQ to Begin Trading Under Its New Symbol MEDT Friday May 23, 2008 6:00 am ET