Patent:GB191309502

"Tabular calculators; adding and subtracting apparatus. - An apparatus for calculating elapsed time between given times of beginning and finishing work, and the wages due therefor at various rates, and also for summing the hours worked daily into a weekly total, comprises pointer-and-dial apparatus for setting the times adapted to co-operate with an adjustable slide mounted on a tabular wage-computing sheet. ..."

• DATUM: 22.05.1914
• TITEL: Improvements in or relating to Calculating Machines.
• PERSON: SLOAN ROLAND HOYT US
• Patent Family: ( Patent:GB191309502, Patent:GB191328662 )

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