Category:1900s patents

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20th-century patents: ← 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s →

Subcategories

This category has the following 10 subcategories, out of 10 total.

1900 patents (4 C, 3 F)
1901 patents (1 C, 2 F)
1902 patents (3 C, 4 F)
1903 patents (2 C, 3 F)
1904 patents (5 C, 2 F)
1905 patents (2 C, 3 F)
1906 patents (3 F)
1907 patents (2 C, 3 F)
1908 patents (2 C, 5 F)
1909 patents (1 F)

Media in category "1900s patents"

The following 4 files are in this category, out of 4 total.

Gas Engine Governor Patent 656, 408.jpg 1,844 × 1,441; 462 KB
Gas engine speed regulator patent 661181.jpg 1,469 × 1,894; 372 KB
Valve-In-Head 1904 patent.jpg 1,763 × 2,796; 891 KB
Wechselbrücke, swap-body patent, DE 209254 (1908).jpg 1,664 × 2,677; 97 KB

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