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Patent:US3850072


Patent:US 3850072
Title:Improvements in or Relating to Instructional Apparatus for Use in Learning the Construczion of Musical Chords
Date:26.11.1974
Place:
Country:USA
Person:Dudley Kilburn Maurice Fuller
Company:
Internal Links:Lehrmittel, Musik
Keywords:
Link to the patent office:
(without guarantee)
 US3850072 (espacenet),  US3850072 (uspto)


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Aus der Patentschrift US3850072