| CPC G10D 3/095 (2020.02) | 18 Claims |

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1. An adjustable neck joint for a stringed instrument comprising:
a neck with a heel portion formed as a first half of a rotating joint; and
a neck block formed as a second half of the rotating joint; wherein
the first half of the rotating joint and the second half of the rotating joint are each configured to connect with each other and movably interface with each other such that the neck is rotatable with respect to the neck block about an axis perpendicular to a longitudinal axis of the neck;
the first half of the rotating joint is one of an arcuate mortise or an arcuate tenon structure; and
the second half of the rotating joint is an opposing one of the arcuate mortise or arcuate tenon structure to the first half of the rotating joint.
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