Autographic telegraph instrument.jpg
United States Government, U.S. Patent and Trademark Office publishing the November 6, 1877 patent of William. Edward. Sawyer
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Autographic telegraph instrument, Autographic telegraph instrument sync apparatus, Autographic telegraph instrument sync apparatus to supplement Sawyer fac-simile telegraph
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Autographic telegraph instrument, United States patent drawings, 1870s patents, Patents from the United States
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自動電信計、自動電信計 同期装置、自動電信計 同期装置、補足 ソーヤーファクシミリ電信
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自動電信計、米国特許図面、1870年代の特許、米国特許
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autographic office instrument telegraph autographed