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All Patents in class 250/204
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
280,426Jul. 03, 1883W. WheelerFocus Regulator for Electric Arc Lampselectric arc lamps
2,694,804Nov. 16, 1954E.K. WagnerPositioning Device
2,714,327Aug. 02, 1955A.R. Squyer, P.F. DirksenPhotoelectric cell circuitelectric switches
3,032,662May 01, 1962G.T. MooreCompensation for Activity Changes in Semiconductor Deviceselectronic circuitry and apparatus
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