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Patents for Farrar & Trefts
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	166,758	Aug. 17, 1875	C.M. Farrar	Rotary Balanced Valve
	335,197	Feb. 02, 1886	W.M. Hoffman	Fleshing and Unhairing Machine
	335,198	Feb. 02, 1886	W.M. Hoffman	Putting Out and Striking Out Machine for Hides or Skins
	941,531	Nov. 30, 1909	E. Oldman	Manhole Cover Plate

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