Patent Drawing for H. R. Sweny's Golf Club - NARA - 7369156.jpg
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Patent Drawing for H. R. Sweny's Golf Club NARA 7369156, 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. R. Sweny's Golf Club
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H・R・スウェニーのゴルフクラブNARA 7369156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:H・R・スウェニーのゴルフクラブ用特許図面
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patent law patent patent right patency patented