1930/en
| 1929 << 1930 >> 1931 |
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Events
- 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.
Births
Deaths
- Emile Walker died on 17th April, 1930 in Saint-Imier.
- Gustav Hesse died on 28th October, 1930.