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All Patents in class 33/507
Patents 1 - 5 of 5
First set of recordsLast set of records
595,865Dec. 21, 1897W.H. ReisnerLens Measuremeasurement gauges
703,725Jul. 01, 1902F. HardingeDiopter gageoptician
900,531Oct. 06, 1908F. HardingeLens measuring instrument
1,151,635Aug. 31, 1915A.T. WebbDiopter gageoptician
2,808,651Oct. 08, 1957C.W. JohnsonCaliper for a Lens or the Likecalipers
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