File:Patent by T. A. Edison for a Electric Vote-Recorder, US90646.pdf

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UNITED STATES PATENT OFFICE. THOMAS A. EDISON, OF BOSTON, MASSACHUSETTS,ASSIGNOR TO HIMSELF AND DEWITT C. ROBERTS, OF SAME PLACE. IMPROVEMENT IN ELECTROGRAPHIC VOTE-RECORDER

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Description
English: UNITED STATES PATENT OFFICE.

THOMAS A. EDISON, OF BOSTON, MASSACHUSETTS,ASSIGNOR TO HIMSELF AND DEWITT C. ROBERTS, OF SAME PLACE. IMPROVEMENT IN ELECTROGRAPHIC VOTE-RECORDER.

Specification forming part of Letters Patent No. 90,646, dated June 1, 1869.
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UNITED STATES PATENT OFFICE. THOMAS A. EDISON, OF BOSTON, MASSACHUSETTS,ASSIGNOR TO HIMSELF AND DEWITT C. ROBERTS, OF SAME PLACE. IMPROVEMENT IN ELECTROGRAPHIC VOTE-RECORDER. Specification forming part of Letters Patent No. 90,646, dated June 1, 1869.

https://patentimages.storage.googleapis.com/ed/51/f2/1d6578141489ca/US90646.pdf
Author Thomas Edison
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Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
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Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Patent_by_T._A._Edison_for_a_Electric_Vote-Recorder,_US90646.pdf

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