Translations:Hardtmuth/1/en
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.[1] 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.
- ↑ although the successors of the American subsidiary proclaim on their site inventors of the first graphite mine, the record belongs to Conté with a patent dated 1785.