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Attachment for Dental Instruments.
Patent for a dental instrument which is to attach to a dental drill handle. Protecting the patient's tongue from being cut by the drill or grinding disk while the patient's lower teeth are being operated on, including illustrations.
Date:
November 19, 1918
Creator:
Luzzi, August F.
System:
The Portal to Texas History
Well-Screen
Patent for a well-screen which is used in oil or water wells for screening out sand from the inflowing fluids
Date:
February 19, 1918
Creator:
Rodrigo, Henry, Sr.
System:
The Portal to Texas History
Process of Tanning Hides and Skins
Patent for rendering the process of tanning hides and skins "more expeditious and considerably cheaper &c., &c." (lines 12-13)
Date:
February 19, 1918
Creator:
Hall, Lewis T. & Tuttle, Frank
System:
The Portal to Texas History
Flexible Metallic Joint
Patent for flexible metallic joint used to make improvements with railroad couplings on trains along with train pipes.
Date:
December 19, 1918
Creator:
Schulz, Wilhelm
System:
The Portal to Texas History