Pencil with eraser

A claw hammer is a tool primarily used for pounding nails into, or extricating nails from, some other object. Generally, a claw hammer is asOn March 30, 1858, Hymen Lipman received the first patent for attaching an eraser to the end of a pencil. In 1862 Lipman sold his patent to Joseph Reckendorfer for $100,000, who went to sue the pencil manufacturer Faber-Castell for infringement. In 1875, the Supreme Court of the United States ruled against Reckendorfer declaring the patent invalid.ciated with woodworking but is not limited to use with wood products.

Source: en.wikipedia.orgAdded: 7 June 2006