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Writing Substance for Writing, Drawing And/Or Painting Tools
US 08648128 B2, Feb. 11, 2014, Andreas Thies / J.S. Staedtler GmbH & Co. KG (Nürnberg, DE)
A polymer-bound writing substance for writing, drawing or painting tools,…

Patentorg has 1 document under Lead Pencil or Marking Crayon Composition or Process of Preparing Patents.

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