Patent Drawing for C. P. Fest's Air Ship - NARA - 6277655.jpg
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Patent Drawing for C. P. Fest's Air Ship NARA 6277655, 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. P. Fest's Air Ship
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C.P.フェストの航空母艦NARA 6277655の特許図面、米国国立公文書館管理局における特許図面、米国国立公文書館所蔵:C.P.フェストの航空母艦の特許図面
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air-ship patent law sekhet patent patent right patency patented