File:Seesaw figure.png

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diagram from patent "Seesaw and ironing-board." US 800434 A

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	03:36, 19 December 2014		2,379 × 1,416 (77 KB)	Chfoo (talk \| contribs)	diagram from patent "Seesaw and ironing-board." US 800434 A

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