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MEDIA SYSTEM AND METHOD OF PROGRESSIVE INSTRUCTION IN THE PLAYING OF A GUITAR BASED ON USER PROFICIENCY, 13/553,310, No. IMRRKL0RPXXIFW4 (U.S. Pat. App. Apr. 1, 2016)
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MEDIA SYSTEM AND METHOD OF PROGRESSIVE INSTRUCTION IN THE PLAYING OF A GUITAR BASED ON USER PROFICIENCY, 13/553,310, No. I8KEI5MFPXXIFW4 (U.S. Pat. App. Apr. 9, 2015)
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