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30/03/1858 Pencil with eraser


Almanac: The pencil and eraser

American inventor Hymen Lipman patented a pencil with attached eraser. He sold his patent for $100,000. It was a good deal because the patent was later invalidated. It was determined to be simply a composite of two devices rather than an entirely new product. However, pencils with erasers are still in use today.
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