TIMEPIECE SHAFT
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United States of America Patent
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Issued Date -
Dec 14, 2017
app pub date -
Jun 9, 2017
filing date -
Jun 13, 2016
priority date (Note) -
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Abstract
A timepiece shaft (1), especially a balance shaft (1), comprising a first functional portion (2a; 2b) including at least one part (221a, 221b) of a pivot-shank (22a; 22b) and/or at least one part (211a, 211b) of a pivot (21a, 21b), the first functional portion being made of ceramic and a first outer diameter (D1) of the first functional portion being less than 0.5 mm, or less than 0.4 mm, or less than 0.2 mm, or less than 0.1 mm
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