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All Patents of Type: parallel rules
Patents 1 - 8 of 8
First set of recordsLast set of records
NumberDatePatenteeTitleType
453XMay 17, 1803J.J. HawkinsPentegraph and parallel rulerparallel rules
85,708Jan. 05, 1869F.A. TrautImprovement in Parallel Rulesparallel rules
195,693Oct. 02, 1877H.K. Averill, Jr.Attachment to Parallel Rulersparallel rules
224,962Feb. 24, 1880C.D. SigsbeeParallel Rulerparallel rules
363,025May 17, 1887A.J. WalkerParallel Ruler for Sign Writersparallel rules
407,350Jul. 23, 1889J.J. HamiltonParallel Rulerparallel rules
433,264Jul. 29, 1890J.R. AndersonParallel Rulerparallel rules
933,798Sep. 14, 1909H. Van AltenaParallel Rulerparallel rules
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