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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
Cotton-Chopper
Patent for a new cotton chopper design that improves the chopper blades' driving gear and the general construction of this type of device, includes instructions and illustrations.
Date:
May 27, 1913
Creator:
Wheeler, Truzy
System:
The Portal to Texas History