Lipman... He actually invented the pencil eraser on top of the pencil because people kept making mistakes. How hard it would without making any mistakes.
a very cleaver person
It's been more than 150 years since the eraserattached itself to the pencil. We can only assume that hymen-lipmanwas a man who made his fair share of mistakes, but they may have inspired him to stick the eraser on the end of the pencil, making it more convenient to erase the written errors. He got a patent for the development on this date in 1858. Lipman's early version was a pencil with a groove at the top, into which he glued an eraser. He sold his patent in 1862; the US Supreme Court later invalidated it, saying that since combining a pencil with an eraser did not change the function of either item, the pencil-with-eraser could not be patented.
in 1770 the eraser was made
Edward Nairne first developed the the eraser and it was widely used. However, these rubbers used to go bad after a certain length of time. Hymen Lipman received the first patent for attaching a rubber to the end of a pencil.
eraser was not invented but discovered by an unknown person
The pencil was invented in 1564 when a graphite mine was discovered in England
pencil earser
three uses of an eraser is a white board eraser a pencil eraser and a black board eraser
The end of the pencil were the eraser is.
1.75
A Pencil is easier to balance on it's eraser because the eraser has a more flater surface.
A mechanical pencil or propelling pencil is a pencil with a replaceable and mechanically extendable pencil lead.The eraser is fitted on top of the pencil at the opposite end to the lead.The maximum length of the eraser would be no more than half an inch when new.
TrackPoint Source - PC Tech
an eraser...like a pencil eraser
It's been more than 150 years since the eraserattached itself to the pencil. We can only assume that hymen-lipmanwas a man who made his fair share of mistakes, but they may have inspired him to stick the eraser on the end of the pencil, making it more convenient to erase the written errors. He got a patent for the development on this date in 1858. Lipman's early version was a pencil with a groove at the top, into which he glued an eraser. He sold his patent in 1862; the US Supreme Court later invalidated it, saying that since combining a pencil with an eraser did not change the function of either item, the pencil-with-eraser could not be patented.
he discovered oxegen, gasses, invented carbonated beverages (soda water) and the pencil eraser
no it is not. if you touch a pencil it will break.
a pencil eraser