"An L-1 visa is a visa document used to enter the United States for the purpose of work in L-1 status. It is a non-immigrant visa, and is valid for a relatively short amount of time, from three months to five years, based on a reciprocity schedule. With extensions, the maximum stay is seven years. L-1 visas are available to employees of an international company with offices in both the United States and abroad. The visa allows such foreign workers to relocate to the corporation's US office after having worked abroad for the company for at least one continuous year within the previous three prior to admission in the US...."
Really it sounds like this is a Visa for a US company to temporarily bring in someone from outside the country, a person who is already an employee of the company.