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Decade
6 Matching Results
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Apparatus for Transmitting Sound-Waves
Patent for transmitting sound waves by magnetic induction and to "furnish an apparatus by which these different vibrations can be heard at the receiving end" (lines 20-22). Includes descriptions and illustrations.
Date:
October 17, 1911
Creator:
Harvey, Fred Brown
System:
The Portal to Texas History
Combined Latch and Lock for Screen Doors, etc.
Patent for a combined latch and lock for screen doors and other uses. Illustration included.
Date:
February 5, 1912
Creator:
Hart, Joel T. & Hart, John D.
System:
The Portal to Texas History
Non-Skid Device
Patent for a device that affixes to automobile wheels to provide tire traction and prevent skidding.
Date:
May 24, 1921
Creator:
Williams, Harry S.
System:
The Portal to Texas History
Safety Lamp-Burner.
Patent for a safety lamp-burner, which extinguishes itself when the lamp is tipped over.
Date:
March 24, 1914
Creator:
Witmond, Christopher B. J.
System:
The Portal to Texas History
Doll Novelty.
Patent for a new device, which is a rounded, weighted base placed in a doll that allows the doll to raise itself when turned over on any side without external assistance by lowering the doll's center of gravity. Descriptions of materials used and illustrations are included..
Date:
November 4, 1902
Creator:
Flint, William G.
System:
The Portal to Texas History
Cultivator.
Patent for a cultivator with spring teeth that are stronger than ordinary cultivator teeth.
Date:
December 8, 1908
Creator:
Baker, Alonzo L. & Baker, Russell
System:
The Portal to Texas History