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4 Matching Results
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Clutch and Transmission Device
Patent for new and useful improvements in the development of clutch and transmission devices.
Date:
February 22, 1921
Creator:
Hubbard, Adra M.
System:
The Portal to Texas History
Drill-Bit.
Patent for improvements in drill bit constructions that allows the drill bit to be switched out and the new bit locked in so it is secure.
Date:
June 22, 1920
Creator:
Midgett, Penelton G.
System:
The Portal to Texas History
Screen Fastener
Patent for the attachment method for wire screens to a frame to prevent the detachment of the wire screen from the frame.
Date:
February 22, 1921
Creator:
McCaffrey, Horace
System:
The Portal to Texas History
Shelving
Patent for a shelving unit designed to display books for sale in a storefront, including illustrations.
Date:
June 22, 1920
Creator:
Wieman, Herman A.
System:
The Portal to Texas History