Proprietà:Patent date

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Data di assegnazione del brevetto, se nota.

Showing 20 pages using this property.
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October 25, 1929  +
December 27, 1929  +
November 25, 1935  +
June 10, 1937  +
October 25, 1938  +
January 25, 1949  +
October 26, 1953  +
September 10, 1899  +
October 10, 1963  +
May 10, 1967  +
June 15, 1907  +
December 27, 1907  +
April 26, 1909  +
March 26, 1901  +
September 25, 1909  +
October 25, 1899  +
November 11, 1912  +
February 10, 1914  +
June 25, 1914  +
September 10, 1915  +