4 Matching Results
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Improvement in Cultivators.
Patent for changes in the construction of a cultivator.
Date:
May 23, 1871
Creator:
Walker, Leander
System:
The Portal to Texas History
Improvement in Devices for Attaching Napkins to the Person
Patent for the improvement of attaching napkins to people in which a flexible ring is ensleeved with a napkins and stretched around the neck of a person.
Date:
May 23, 1871
Creator:
Raiford, Philip H.
System:
The Portal to Texas History
Improvement in Grinding-Mills
Patent for an improvement in grinding-mills, combining the operative mechanism with spindles - in which the both the grinding stones obtain relative surface speeds only half the actual speed of the stones.
Date:
May 9, 1871
Creator:
Hensley, Henry
System:
The Portal to Texas History
Improvement in Rotary Engines.
Patent for improvements in valves used in rotary engines.
Date:
May 9, 1871
Creator:
Hughes, Robert
System:
The Portal to Texas History