Patent Drawing for H. Hueg's Cake Machine - NARA - 6277793.jpg
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Patent Drawing for H. Hueg's Cake Machine NARA 6277793, 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 H. Hueg's Cake Machine
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H. Huegのケーキマシンの特許図面 NARA 6277793、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のUtility Patent Drawings、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、H. Huegのケーキマシンの特許図面
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patent law adding machine patent patent right patency patented