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Apparatus for Projecting Motion-Pictures.
Patent for an improvement to motion picture projectors that lowers the operating speed, thus reducing the amount of film needed for movies, and eliminates flickers in the projection. This patent includes instructions and illustrations.
Date:
November 27, 1917
Creator:
Craig, Richard M.
System:
The Portal to Texas History
Composition for Sealing Tire-Punctures and the Like.
Patent for sealing tire punctures consisting of the extract obtained from boiling guayule and candelilla plants in water to which is added asbestos and fullers' earth.
Date:
November 27, 1917
Creator:
Garza, Ricardo
System:
The Portal to Texas History