1 / 6

Pencil Eraser Patent

Pencil Eraser Patent. Presented by Irene Varela. 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.

aspen
Download Presentation

Pencil Eraser Patent

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  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!

More Related