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Loose-Leaf Binder.
Patent for a loose-leaf binder for medicine prescriptions, which is easier to open and close than previous ones.
Date:
July 23, 1907
Creator:
Perkins, John Hardeman
System:
The Portal to Texas History
Double Speed Engine
Patent for a double speed engine. Illustrations included.
Date:
July 12, 1904
Creator:
Richards, Oliver L.
System:
The Portal to Texas History