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Patents for James L. Haven
Patents 16 - 26 of 26
First set of recordsPrevious set of recordsLast set of records
NumberDatePatenteeTitleType
259,685Jun. 20, 1882J.B. Mooney, J.L. HavenStaging for steamboatsnautical
283,779Aug. 28, 1883J.L. HavenTobacco-cuttertobacco machinery
450,965Apr. 21, 1891E.S. MatthewsElevator-valve controller
453,980Jun. 09, 1891E.S. MatthewsHydraulic valve-gear
455,536Jul. 07, 1891E.S. MatthewsElevator
469,655Feb. 23, 1892E.S. MatthewsElevator-controller
472,930Apr. 12, 1892E.S. MatthewsController for elevators
476,289Jun. 07, 1892E.S. MatthewsSafety device for elevators
481,580Aug. 30, 1892E.S. MatthewsElevator-controlling mechanism
503,975Aug. 29, 1893E.S. MatthewsHydraulic valve-gear
519,639May 08, 1894E.S. MatthewsHydraulic valve
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