Patent Drawing for C. Singer's Rocking Chair - NARA - 18558022.jpg
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Patent Drawing for C. Singer's Rocking Chair NARA 18558022, 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 C. Singer's Rocking Chair
commons
ja
C・シンガーのロッキングチェアNARA18558022の特許図面、米国国立公文書館管理局の特許図面:米国国立公文書館管理局の特許図面、画像:その他のC・シンガーのロッキングチェアの特許図面
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rocking chair office chair patent law chair of state patent patent right patency patented