Patent Drawing for A. Bayer's Thermometer - NARA - 6277656.jpg
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Patent Drawing for A. Bayer's Thermometer NARA 6277656, 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 A. Bayer's Thermometer
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A. バイエルの熱量計NARA 6277656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: A. バイエルの熱量計のための特許図面
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patent law thermometer patent patent right patency patented