3 Matching Results
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Hoisting Apparatus.
Patent for a hoisting apparatus for use in cranes.
Date:
March 21, 1911
Creator:
Fischer, Fritz, Jr.
System:
The Portal to Texas History
Trap
Patent for a trap for catching rats. Illustrations included.
Date:
March 21, 1911
Creator:
Clark, William Joseph
System:
The Portal to Texas History
Detector for Wireless Signaling Apparatus.
Patent for wireless signaling apparatus which provides a detector which shall be universal in its application, by means of which any of the well known minerals or materials may be employed and removably held in proper position.
Date:
November 21, 1911
Creator:
Johnson, Maurice Bernays
System:
The Portal to Texas History