Practitioners who receive authentic rank or instructor certifications in Tang Soo Do and the Soo Bahk Do® martial art system through legitimately authorized Moo Duk Kwan® schools can proudly trace their unbroken lineage through their instructor and their instructor's instructors all the way back to 1945.

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On August 17, 2015 Federal District Judge, Robert Mariani handed down a winning verdict to the MOO DUK KWAN®  in the landmark Federation trademark infringement case filed by the United States Soo Bahk Do Moo Duk Kwan Federation® April 10, 2012 protecting the MOO DUK KWAN® name and the fist and laurel leaves logo.

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Registered trademarks assure the public consumer of the consistent quality and standards they can expect from the products and services associated with and/or bearing registered trademarks. Registered trademarks displayed in relation to, or affixed to, products and services, identify the source for the products and services and only the registered trademark owner regulates quality and consistency…

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The U.S. Soo Bahk Do Moo Duk Kwan Federation's trademark initiatives are chartered purposes of the Federation and are intended to protect the long standing public recognition and goodwill associated with its well known trademarks. Moo Duk Kwan® was first coined by Founder Kee Hwang in 1945 as the name of his martial art schools in Seoul,…

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