When:
March 30, 2020 all-day
2020-03-30T00:00:00-06:00
2020-03-31T00:00:00-06:00
Where:
http://www.google.com/patents/US19783

The pencil with an eraser on the end was first patented 30 March 1858 by Hyman Lipman.

Image courtesy of pixabay.com

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