|
|
The Daily Guide - Waynesville, MO
Lead Pencil and Eraser
email print
About this blog
Recent Posts
June 29, 2015 5:20 p.m.
June 21, 2015 12:01 a.m.
June 14, 2015 12:01 a.m.
June 5, 2015 11:25 a.m.
May 29, 2015 11:25 a.m.
By Liz Davis
March 30, 2013 12:01 a.m.

March 30, 1858
Lead Pencil and Eraser
Inventions aren't always something new. Sometimes they are something old but used in a new way. On March 30, 1858, Philadelphian Hyman L. Lipman was granted patent #19,783 for his "combination lead pencil and eraser." Both items were in use at the time, but had never been part of the same writing instrument.
http://www.lawabel.com/this-week-in-intellectual-property-history-for-the-week-of-july-25-2011/

Recent Posts

    latest blogs

    • Community
    • National

    Events Calendar