UNT Libraries Government Documents Department - 5 Matching Results

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Safety Window-Screen.

Description: Patent for a window screen that is adjustable to different size windows and locks in place on the window frame at different heights to provide a cover for the opening left when a window is opened for ventilation for the purpose of preventing anyone from entering the house through the window.
Date: April 23, 1907
Creator: Crosby, Matthew G.
Item Type: Refine your search to only Patent

Cultivator.

Description: Patent for a cultivator with adjustable teeth positions to allow for variation in distance between rows or different types of crops.
Date: March 26, 1907
Creator: Vance, Sidney, F.
Item Type: Refine your search to only Patent
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