1931/en
Version vom 6. Oktober 2011, 00:35 Uhr von Torsten (Diskussion | Beiträge)
| 1930 << 1931 >> 1932 |
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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
- Gérald Charles Genta was born on 1st May, 1931 in Geneva.