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in creator/contributor: "Helm, Clyde D."  
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Hydraulic Pressure and Time Indicator

Description: Patent for hydraulic pressure and time indicator for "recording the times when hydraulic cylinders are in operation and to indicate when the cylinders commence work or reach the required pressure" (lines 10 - 14).
Date: December 24, 1918
Creator: Helm, Clyde D.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Saw-Gummer.

Description: Patent for saw gummers with simplified operation and adjustable attachments, enabling quicker gumming or sharpening of gin or metal saws, such as those in a cotton gin.
Date: August 12, 1919
Creator: Helm, Clyde D.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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