Patents for Frank P. Leffingwell


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Patents for Frank P. Leffingwell
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	175,871	Apr. 11, 1876	A.D. Palmer	Improvement in machines for laying out stair-rails
	948,172	Feb. 01, 1910	A.D. Ide	Device for Dividing Circles or Arcs of Circles