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Cement.
Patent for cement of the type commonly known as Keene's cement, which is harder and glossier than other types of cement.
Date:
March 23, 1909
Creator:
Jones, Thomas
System:
The Portal to Texas History
Cooling and Disinfecting Device.
Patent for improvements in fluid cooling and disinfecting devices. The primary object of improvements is "to provide a simple, inexpensive and efficient device of this character which will be well adapted to the purpose for which it is designed."
Date:
February 23, 1915
Creator:
Womack, Samuel W.
System:
The Portal to Texas History