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1500×1130
The Patent Office Model Gallery at the Smithsonian Institution, preserving thousands of miniature working models submitted by inventors with US patent applications between 1790 and 1880. [1500×1130]
13 Haziran 2026
![The Patent Office Model Gallery at the Smithsonian Institution, preserving thousands of miniature working models submitted by inventors with US patent applications between 1790 and 1880. [1500×1130]](https://wp.rifat.org/wp-content/uploads/2026/06/3l7ld3og4a6h1.jpeg)
