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Patents for H. S. Tarr & Son
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
40,428	Oct. 27, 1863	W.H. Polleys, D.D. Polleys	Improvement in Plumb-Levels	inclinometers
169,927	Nov. 16, 1875	H.S. Tarr	Improvement in plumb-levels	inclinometers

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