It is an interesting fact that the Italian inventor (P. Turri) had also developed the idea of the carbon paper by at least 1809, but he wasn't the first to patent the invention. We were amazed to know that the both men declared that the invention was made in order to help blind people!

Actually, the invention wasn't used only by the disabled people because the Englishman soon understood that he could sell it as a means of copying business/private letters.