Description19560731 Bowling pin-setting mechanism - U. S. Patent 2,757,000.png
English: Assembled clippings from U. S. Patent 2,757,000, "Bowling pin-setting mechanism", including Figure 2, altered by uploader to highlight candlepins in blue.
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Assembled clippings from U. S. Patent 2,757,000, "Bowling pin-setting mechanism", including Figure 2, altered by uploader to highlight candlepins in blue.
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inception
31 July 1956
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image/png
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b46209a7255aef26f6d280b893d92feac35b28c2
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