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All Patents of Type: line levels
Patents 1 - 5 of 5
First set of recordsLast set of records
NumberDatePatenteeTitleType
691,631Jan. 21, 1902J.H. JacksonSpirit Levelline levels
1,000,512Aug. 15, 1911I.L. GriswoldLine Levelline levels
1,369,652Feb. 22, 1921F.B. HallOctagon Line & Surface Levelline levels
1,716,744Jun. 11, 1929A.L. StowellLine levelline levels
2,014,709Sep. 17, 1935F.A. VolzLine Levelline levels
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