Calculating-Machine
Description:
Patent for certain new and useful improvements in calculating machines. Whereby substantially correct calculations may be registered or recored without using a series of superfluous or immaterial numbers. The machine will round prices up to the nearest cent. For example, $0.024 becomes $0.02 while $0.025 becomes $0.03. Illustrations included.
Date:
March 6, 1917
Creator:
Hardgrave, Everett J.
Item Type:
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Patent
Partner:
UNT Libraries Government Documents Department