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All Patents in class 250/463.1
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
692,097Jan. 28, 1902J.R. WoodCat's Eye Levellevels
1,318,162Oct. 07, 1919E.J. LoringLuminous Levellevels
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