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In 1906, G. Gibbs applied for a patent for a novel sundial design—the Universal Equinoctial Mean Time Helio-chronometer. The Pilkington & Gibbs Heliochronometer represented a technical pinnacle of early modern sundials, combining mechanical ingenuit
January 13, 2026
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Prusa MK4SPrusa MK2.5/SCreality Ender 3 V2
English, French
Joined in May 16, 2019
Retired R&D Manager with a background in Astronomy, Physics and Electronics Engineering.