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All Patents of Type: center squares
Patents 1 - 14 of 14
First set of recordsLast set of records
9,089Jul. 06, 1852N. AmesCenter Square for Finding the Center of a CIrclecenter squares
82,917Oct. 13, 1868G.W. BrooksCentering Squarecenter squares
229,283Jun. 29, 1880L.S. StarrettTry Squarecenter squares
249,821Nov. 22, 1881S.H. BellowsCombination Squarecenter squares
265,287Oct. 03, 1882W.H. SleeperCentering Try Squarecenter squares
329,892Nov. 10, 1885J.C. EckertCombined Gage and Center Squarecenter squares
407,285Jul. 16, 1889C. EnsmingerCombined Square, Level, Protractor, &c.combination tools
659,513Oct. 09, 1900A.P. DubusSquaremiter squares
705,867Jul. 29, 1902H.H. RichardsonCombination Square and Levelbevel squares
786,824Apr. 11, 1905R.C. LynnSquaretry squares
798,695Sep. 05, 1905E. OehrleCombination Square and Protractorprotractors
1,262,434Apr. 09, 1918W.E. BeeckScriber Attachmentcurve marking gauges
1,429,793Sep. 19, 1922E.T. StraussCenter-Finding Instrumentcenter squares
1,526,143Feb. 10, 1925G.F. HallBoye's Combination Toolrule attachments
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