The web site that I normally use for questions having to do with any inquiries about visas is this web site.
http://projectvisa.com/regiondisplay.asp?regionname=north%20america
In your situation, I used the following information:
"L classification applies to intracompany transferees who, within the three preceding years, have been employed abroad continuously for one year, and who will be employed by a branch, parent, affiliate, or subsidiary of that same employer in the U.S. in a managerial, executive, or specialized knowledge capacity;"
Since your requirements are different then what is stated here, I think you need to contact the nearest US embassy or consulate and ask them how your situation should can be resolved. This way you will get an answer from them that should be 100% correct. Let me know how it works out for you.
