Telegraphic Alarm and Signal Apparatus, January 23, 1877
Item
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Title
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Telegraphic Alarm and Signal Apparatus, January 23, 1877
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Author
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Thomas A. Edison
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Date Executed
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1876-05-09
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Date Filed
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1876-05-18
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Date Issued
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1877-01-23
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Type
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Patent Issued
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Subject
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Telegraphy and Telephony
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Document ID
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PAT186548
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Has Format
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https://iiif.archive.org/iiif/edisonpatent186548/manifest.json
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Rights
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Edison's patents are in the public domain and have been made available through the generosity of David Kovanen.
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Publisher
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The Thomas A. Edison Papers