Soo Bahk Do® is a federally registered trademark identifying the martial art system founded by Kee Hwang and instructed exclusively in the U.S. through the U.S. Soo Bahk Do Moo Duk Kwan Federation by Certified Instructors at certified locations.

Today Moo Duk Kwan® schools nationwide authorized by Kee Hwang through the non-profit U.S. Soo Bahk Do Moo Duk Kwan Federation of which he was lifetime president are the  only legitimate sources of instruction for the Soo Bahk Do® martial art system.