Patent Drawing for John Deere's Improvement in Plows - NARA - 12007668.jpg
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Patent Drawing for John Deere's Improvement in Plows NARA 12007668, 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 John Deere's Improvement in Plows
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ジョン・ディアの改良のための特許図面 NARA 12007668、米国国立公文書館管理局の特許図面、米国国立公文書館シリーズ:実用特許図面、米国国立公文書館管理局の画像、米国国立公文書館の位置。もう1つは、ジョン・ディアの改良のための特許図面
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patent law patent patent right patency patented