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Process of Producing Perhalates
Patent for an improved process of producing perhalates, perchlorates, and their corresponding acids.
Date:
September 24, 1918
Creator:
Schoch, Eugene Paul
System:
The Portal to Texas History
Paving
Patent for road paving material with cement as a base and stones or gravel used as a topping. Asphalt is poured over the gravel to extend the life of the paving.
Date:
June 24, 1913
Creator:
MacDonald, Ray
System:
The Portal to Texas History
Case for Rural-Mail Carriers.
Patent for a device to enable rural mail carriers to efficiently carry and store postal items for sale. The storage unit (device) is water-resistant to protect the items inside from inclement weather while delivering mail.
Date:
April 24, 1917
Creator:
Campbell, Guy
System:
The Portal to Texas History