Court convictions in Nevada are permanent and will remain on your record. The charges, plea (guilty or not guilty), final verdict, parole, and early release information is all part of the court records that Nevada maintains.
Court conviction records do not typically include cases that were dismissed or where the person was found not guilty. However, there will be other records in existence which state that you were arrested and charged with a felony--as described below. Along with court conviction records, Nevada also keeps a Criminal Record of all individuals who have had any sort of official interaction with the law.