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Plotter.
Patent for an improvement in "surveying-instruments, and has for its object to produce a simple device whereby certain information can be obtained without the necessity of auxiliary calculations,” (lines 12-15) includes illustration.
Date:
March 24, 1891
Creator:
Smith, Valentine Hartgroves
System:
The Portal to Texas History
Car-Coupling.
Patent for an automatic coupling that can be used in any car and without replacing the existing draw-head. Includes instructions and illustrations.
Date:
July 29, 1891
Creator:
Taylor, Debos & Taylor, William M.
System:
The Portal to Texas History