logo

Video encyclopedia

30/03/1858 Pencil with eraser

2:05

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.
    Explore contextually related video stories in a new eye-catching way. Try Combster now!
    • Essentials 

    • History 

    • Types