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in subjects: "Science and Technology - Tools"  
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Washer.

Description: Patent for a hinged washer, which can be removed from a bolt without removing the nut.
Date: February 8, 1910
Creator: Vannoy, John B.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Rake.

Description: Patent for a rake with curved ends and multiple teeth that hold the material and keep it from going to the sides.
Date: August 15, 1916
Creator: Green, Ella M.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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