On Mar 30, 1858, Hyman Lipman patented the pencil with an eraser on top.

On Mar 30, 1858

Hyman Lipman patented the pencil with an eraser on top.

His patent included a metal ferrule to keep the eraser in place.

More Like This

Feb 2, 1935

A polygraph test was conducted by its inventor, Leonarde Keeler, for the first time.

Jul 17, 1902

Willis Carrier invented the world's first electronic air conditioner.

Jun 6, 1882

Henry W. Seely patented the electric iron in the US.

Mar 22, 1960

Arthur Schawlow & Charles Townes was granted the first patent for a laser.

Sep 23, 1879

Inventor Richard Rhodes received the patent for a hearing aid.

What Happened on Mar 30?

What Happened in 1858?