Patent Drawing for H. R. Cool's Electrotherapeutic Syringe - NARA - 7369164 (page 1).jpg
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Patent Drawing for H. R. Cool's Electrotherapeutic Syringe NARA 7369164 (page 1), 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. Cool's Electrotherapeutic Syringe
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H・R・クールの電気治療シリンジNARA 7369164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・クールの電気治療シリンジの特許図面。
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patent law syringe hypodermic syringe patent patent right