Resource Type
Counties
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Die for Sash-Weights.
Patent for a die for sash weights that allows for easy removal of the die from the mold.
Date:
June 13, 1911
Creator:
Clarkson, William
System:
The Portal to Texas History
Pipe-Tongs.
Patent for pipe tongs used for rotary well boring machinery. The tongs are designed to be carried with and used by rotary machines.
Date:
February 13, 1912
Creator:
Johnston, Horace G.
System:
The Portal to Texas History
Rotary Attachment
Patent for an attachment for rotary well drilling machinery meant to "provide means for automatically gripping a pipe when being raised to prevent such pipe from slipping back while the lifting tools are being lowered for such lifting" (lines 13-17)
Date:
April 13, 1915
Creator:
Johnston, Horace G.
System:
The Portal to Texas History