Philip B. Downing Invention - 搜索图片

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youtube.com
Wednesday's Recap - Phillip B. Downing - American Inventor - YouTube
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youtube.com > AGGRESSIVE INTELLIGENCE
Philip B. Downing - The Man Who Invented the Improved Mailbox and Secured FIVE US Patents!
YouTube · AGGRESSIVE INTELLIGENCE · 3402 次播放 · 2023年2月2日
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youtube.com > NikkiTrue Topics
The Phillip B. Downing Story
YouTube · NikkiTrue Topics · 907 次播放 · 2022年6月24日

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blackinventor.com
Philip Downing | The Black Inve…
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blogspot.com
THROUGH ZENA'S EYES - BLACK HI…
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540westmain.org
28 Days of Little Known Facts …
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swansnature.com
Who Was Philip B. Downing? – SwansNature
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The Devil’s Punchbowl
Looking Black On Today In 1891, Phillip B. Dow…
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YouTube > WadiVibe
Philip B. Downing
YouTube · WadiVibe · 5645 次播放 · 2017年2月8日

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pinterest.pt
Pin by African Business & Engine…
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pinterest.com
Phillip B Downing inven…
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SlideServe
PPT - Black Inventors PowerPoint Presentation - ID:1779635
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YouTube > Beta Lisolo
African American Inventor | Philip B Downing - Mailbox (Part 1)
YouTube · Beta Lisolo · 6067 次播放 · 2019年8月20日
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Pinterest
"Phillip B. Downing, an A…
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twitter.com
Black History Heroes on Twitte…

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YouTube > smash tv
African's first PHILIP B DOWNING
YouTube · smash tv · 609 次播放 · 2016年7月29日
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lasentinel.net
This Week in Black History (A…
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fi.edu
Benjamin Franklin’s Inventions | The Franklin Institute
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jamiepaulsmith.blogspot.com
Famous Black Inventors Technology - Jamie Paul Smith

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jeopardylabs.com
Discoveries and Inventions Jeopardy Template

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