Patent classifications
G
PHYSICS
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G04
HOROLOGY
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G04B
MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
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27/00
Mechanical devices for setting the time indicating means
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G04B27/002
The setting apparatus being crown shaped
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G04B27/002

CERAMIC HOROLOGY OR JEWELLERY COMPONENT
20250390064 · 2025-12-25 · ·

A horology or jewellery component, characterised in that it contains phase silicon nitride in a percentage by volume comprised between 99% and 100%.