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Combined Computing Device and Weighing-Scale.
Patent for "a simple, economical, and portable combined computing and weighing scale for ordinary use so simple in its operation that an illiterate person can manipulate it with as much facility as one trained to the practical use of more complicated devices" (lines 20-25).
Date:
July 11, 1899
Creator:
Stephens, John H.
System:
The Portal to Texas History
Combined Multiple Weight And Pendulum Scale.
Patent for certain new and useful improvements in a combined multiple weight and pendulum scale and appliance, including instructions and illustrations.
Date:
July 11, 1899
Creator:
Stephens, John H.
System:
The Portal to Texas History