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Patents for Keuffel & Esser Co.
Patents 1 - 10 of 10
First set of recordsLast set of records
NumberDatePatenteeTitleType
233,358Oct. 19, 1880H.H. Leistner, C.E. LeistnerTape-measuretape measures
338,602Mar. 23, 1886W.J. KeuffelTape Measure Casetape measures
363,070May 17, 1887W. KeuffelTape Measure Casetape measures
393,290Nov. 20, 1888A.C. BothScale divider and section linerlayout tools
496,123Apr. 25, 1893W.L. KeuffelZig Zag Rulefolding rule joints
645,263Mar. 13, 1900W.L. KeuffelTape reeltape measures
651,142Jun. 05, 1900W.L. KeuffelSlide Ruleslide rules
702,439Jun. 17, 1902W. KeuffelTape Reeltape measures
1,150,771Aug. 17, 1915W.L. KeuffelSlide rule runnerslide rules
1,501,169Jul. 15, 1924A.W. KeuffellProcess of Making Drawing Instrumentslayout tools
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