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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
Electric Clock.
Patent for new and useful improvements in electrically operated clocks, including instructions and illustrations.
Date:
February 13, 1900
Creator:
Iversen, Henry
System:
The Portal to Texas History