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States
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Jack.
Patent for a jack for lifting heavy loads on railroads, which has an automatic steady movement of the load up and down without adjusting the jack settings.
Date:
August 6, 1907
Creator:
Blake, David Alexander & Blake, Charles William
System:
The Portal to Texas History
Needle for Graphophones and the Like.
Patent for a gramophone needle that produces better sound due to allowing for vibrations and can be used longer by producing a a sharpened point on one side while playing that can be used the next time by turning over the needle.
Date:
April 9, 1907
Creator:
Petmecky, Fred
System:
The Portal to Texas History