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Window Sash And Curtain Operating Mechanism
Patent for a window sash and curtain mechanism that works in tandem with electronic security systems. Sash/Curtains can be moved normally, but an alarm can be set to detect when the window itself is tampered with.
Date:
October 25, 1917
Creator:
Schwarz, Henry W.
System:
The Portal to Texas History
Cultivator-Hobble
Patent for an improved cultivator hobble, including illustrations.
Date:
September 25, 1917
Creator:
Hackfeld, John H.
System:
The Portal to Texas History