L1B Specialized Knowledge

An L-1B is an alien coming temporarily to perform services that entail specialized knowledge for the same corporation or firm, or for the branch, subsidiary, or affiliate of the employer who employed him abroad for one continuous year within the three-year period, immediately preceding the filing of the petition, in a specialized knowledge capacity. 

Specialized knowledge is special knowledge of the employer’s product or its application in international markets or an advanced level of the knowledge of the employer’s processes and procedures. 

A person of specialized knowledge however will need a labor certification to obtain legal permanent residence status.