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Adding-Machine
Patent for "an adding-machine which, while being constructed of but comparatively few parts, will be so adjusted as arranged as to allow an operator to make rapid and correct calculations; furthermore, to produce an adding-machine in which the operator will be enabled to detect immediately any mistake which he may have made, and, finally, to produce a simple, efficient, and effective adding-machine" (lines 13-22).
Date:
June 25, 1889
Creator:
Stinson, James C.
System:
The Portal to Texas History