Category:1950s patents

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

Subcategories

This category has the following 6 subcategories, out of 6 total.

1950 patents (6 F)
1951 patents (2 C, 14 F)
1954 patents (2 F)
1955 patents (2 F)
1956 patents (1 F)
1958 patents (1 C)

Media in category "1950s patents"

This category contains only the following file.

19560731 Bowling pin-setting mechanism - U. S. Patent 2,757,000.png 1,641 × 3,260; 658 KB

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