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4 Matching Results
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Automatic Fuel-Changing Valve.
Patent for Automatic Fuel Changing Valve. The purpose of the invention is to provide a mechanism that switches to another gas supply when the one which is feeding the system runs low.
Date:
March 26, 1918
Creator:
Connelly, John S.
System:
The Portal to Texas History
Journal-Box
Patent for a journal box that requires no disassembly to be replenished. Illustrations included.
Date:
July 26, 1910
Creator:
McFadden, John M.
System:
The Portal to Texas History
Telephone System.
Patent for a telephone system that can be used for long distance calls.
Date:
September 26, 1911
Creator:
McKibben, Charles W.
System:
The Portal to Texas History
Process of Making Aromatic Hydrocarbons
Patent for an invention that relates to processes of making aromatic hydrocarbons, and comprises a method of producing lower boiling aromatic hydrocarbons.
Date:
June 26, 1917
Creator:
Alexander, Clive M.
System:
The Portal to Texas History