Patent Drawing for a Pencil - NARA - 594410.jpg
en
Patent Drawing for a Pencil NARA 594410, Patent drawings in the National Archives and Records Administration, US National Archives series: Utility Patent Drawings, Images from the National Archives and Records Administration, US National Archives location: other, Patent Drawing for a Pencil
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ペンシルNARA 594410の特許図面、米国国立公文書館管理局の特許図面、米国国立公文書館の画像:ペンシルのペンシル描画
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patent law patent right patent patency patented slate pencil pencil paint brush paintbrush