1930/en: Unterschied zwischen den Versionen
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| − | *On [[January 11|11th January]], [[ | + | *On [[January 11|11th January]], [[1930/en|1930]], [[Hatot, Léon|Léon Hatot]] was awarded the main patent No. 704.910 for the [[Blancpain Rolls|Rolls]]-watch automatic [[winding mechanism]]. The additional patents Nos. 38.984, 39.523 and 39.581 were awarded to him on [[November 30|30th November]], [[1931/en|1931]]. |
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Version vom 13. August 2011, 23:55 Uhr
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- On 11th January, 1930, Léon Hatot was awarded the main patent No. 704.910 for the Rolls-watch automatic winding mechanism. The additional patents Nos. 38.984, 39.523 and 39.581 were awarded to him on 30th November, 1931.