Pencil Eraser Patent - PowerPoint PPT Presentation

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Pencil Eraser Patent

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  1. Pencil Eraser Patent Presented by Irene Varela

  2. Some History… • For a long time people erased with bread • 1770 Edward Naime created first rubber eraser • 1776 Joseph Priestley suggested the use of a substance that erases lead • 1839 Charles Goodyear discovers vulcanization

  3. A Pencil with an Eraser… • INVENTION: Pencil with Eraser • INVENTOR: Hyman L. Lipman, U.S. • YEAR: 1858

  4. Now days eraser for a pencil…

  5. Any Questions??? Thank you for your time!