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Oil-Heater.

Description: Patent for an oil heater, which has a oil reserve and burner in the bottom and flues in the top through which the heat radiates.
Date: February 18, 1908
Creator: Ray, James T.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Blackboard-Eraser

Description: Patent for "blackboard-erasers in which the erasing material is detachable from the wood block or handle and permits...being used continuously."
Date: November 18, 1902
Creator: Williams, Lavinia B.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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