Category:United States patent 129971

**Improvement in Telegraphing**
	United States patent 129971
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	Wikisource
Instance of	patent; United States patent;
Author	Mahlon Loomis;
Discoverer or inventor	Mahlon Loomis;
Language of work or name	English;
Publication date	30 July 1872;
Authority file
	Q128593960;
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