Patent Drawing for M. E. Knight's Clasp - NARA - 12007671.jpg
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Patent Drawing for M. E. Knight's Clasp NARA 12007671, 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 M. E. Knight's Clasp
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M.E.ナイトのCrasp NARA 12007671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:その他の、M.E.ナイトのCraspdraw
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knight's service patent law patent patent right patency patented