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All Patents of Type: spirit levels
Patents 1 - 9 of 9
First set of recordsLast set of records
84,880Dec. 15, 1868C.F. HillSpirit Levelspirit levels
281,086Jul. 10, 1883S.H. LemonSpirit Levelspirit levels
359,580Mar. 15, 1887W.C. ThatcherSpirit Levelspirit levels
391,717Oct. 23, 1888C.H. MillerSpirit Level and Inclinometerspirit levels
505,445Sep. 26, 1893W.R. DortonAdjustable Spirit Level and Plumb Devicespirit levels
683,033Sep. 24, 1901E.E. FrederickSpirit Levelspirit levels
730,568Jun. 09, 1903W. PotterCombination Carpenter's Levelspirit levels
743,100Nov. 03, 1903W. PotterCarpenter's Level and Quadrantspirit levels
756,949Apr. 12, 1904R.B. FergusonSpirit Levelspirit levels
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