Patent Drawing for S. Boone's Ironing Board - NARA - 12007678.jpg
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Patent Drawing for S. Boone's Ironing Board NARA 12007678, 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 S. Boone's Ironing Board
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S・ブーンによるアイロン委員会の特許図面 NARA 12007678、米国国立公文書記録管理局の特許図面:米国国立公文書館管理局の特許図面、画像:米国国立公文書館の所在地: S・ブーンによるアイロン委員会の特許図面
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ironing board ironing patent law pressing patent patent right patency patented