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</noinclude>''Hardtmuth'' (or ''"L & C Hardtmuth"''), more commonly known as ''"[[Koh-i-Noor]] Hardtmudt"'', is a historic producer of pencils and office supplies that was founded in [[1790]] by ''Joseph Hardtmudt'', which in [[1802]] patented the first pencil made of clay and coal. Born in the Austro-Hungarian Empire, the company was transferred from the sons of the founder from Vienna to České Budějovice, currently in the Czech Republic. The company introduced in [[1889]] the line of pencils ''"Koh-i-Noor"'', called by the same name of the famous diamond to magnify their quality. To distinguish them, they were painted in yellow, a color that from then has become a classic for pencils.

</noinclude>''Hardtmuth'' (or ''"L & C Hardtmuth"''), more commonly known as ''"[[Koh-i-Noor]] Hardtmudt"'', is a historic producer of pencils and office supplies that was founded in [[1790]] by ''Joseph Hardtmudt'' in Vienna as an earthenware factory, which in [[1802]] patented a pencil made of clay and coal.<ref>although the successors of the American subsidiary proclaim on [https://www.kohinoorusa.com/about their site] inventors of the first graphite mine, the record belongs to [[Conté]] with a patent dated [[1785]].</ref> Established in the Austro-Hungarian Empire, in [[1848]] the factory was transferred by the sons of the founder from Vienna to České Budějovice, currently in the Czech Republic. The company introduced in [[1889]] the line of pencils ''"Koh-i-Noor"'', called by the same name of the famous diamond to magnify their quality. To distinguish them, they were painted in yellow, a color that from then has become a classic for pencils.