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Casting Dental Plates.
Patent for casting dental plates which builds upon a previous patent by the same inventor, Patent No. 633,222, accepted on September 19, 1899. This patent professes to eliminate previous issues with casting metal such as pinholes and air bubbles that create imperfections in the dental plates.
Date:
May 27, 1902
Creator:
Streetman, Willard
System:
The Portal to Texas History
Vending Machine
Patent for a vending machine. Illustrations included.
Date:
May 3, 1904
Creator:
Stroop, George G.
System:
The Portal to Texas History
Lemon Juice Extractor
Patent for a lemon juice extractor. Illustration included.
Date:
May 2, 1905
Creator:
Conroy, Eliza D. & Jobe, L. D.
System:
The Portal to Texas History