Category:1930s patents

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

Subcategories

This category has the following 8 subcategories, out of 8 total.

1930 patents (1 C, 2 F)
1932 patents (1 F)
1934 patents (6 F)
1935 patents (6 F)
1936 patents (3 F)
1937 patents (1 C)
1938 patents (1 C, 10 F)
1939 patents (1 C, 6 F)

Media in category "1930s patents"

The following 3 files are in this category, out of 3 total.

Harry G. Traver Cyclone roller coaster patent.png 2,417 × 1,481; 328 KB
Junker Patentschrift 613176-1931.jpg 2,193 × 3,249; 4.6 MB
Traver Coaster Jazz Track.png 1,051 × 695; 31 KB

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