This goes for the need of society and need of the inventor. Usually it is a need for the inventor. There was the story about the inventor of safety pin. (Perdible) He owed someone $15 and then made an inventrion which he sold for $400.00 but the safety pin business is about a billion dollar. The secret of the safety pin the twited wire at the other end serving as the spring to hold the pin in the cage firmly pressed.
His name is Walter Hunt
