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5 Matching Results
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Mail-Bag Fastener.
Patent for a mail bag fastener which automatically locks when closed and can only be opened with a key.It also holds the mail bag open when letters are being withdrawn.
Date:
July 16, 1907
Creator:
Barr, George Taylor
System:
The Portal to Texas History
Trolley-Pole.
Patent for a trolley pole, which attaches easily to the wire and can be placed on it by the operator without him leaving his station on the trolley.
Date:
March 16, 1909
Creator:
Barr, George T., Sr.
System:
The Portal to Texas History
Electric Signal System
Patent for electric signal system. Illustration included.
Date:
May 16, 1905
Creator:
Adams, Edwin Johnson
System:
The Portal to Texas History
Cultivator
Patent for a cultivator designed so that the plows can be conveniently set to any pitch as needed for deep or shallow plowing. Illustrations included.
Date:
February 16, 1909
Creator:
Miller, John T.
System:
The Portal to Texas History
Combined Touch-Regulating and Mute Attachment for Pianos
Patent for combined touch regulating and mute attachment for pianos.
Date:
December 16, 1902
Creator:
Harriss, Langdon & Kendall, William H.
System:
The Portal to Texas History