|
US1219445A
|
|
Rebounding device for number-printing mechanisms.
|
|
US1197278A
|
|
Multiple-accumulator adding and listing machine.
|
|
US1203863A
|
|
Mechanical calculator.
|
|
US1197277A
|
|
Number printing and punctuating mechanism.
|
|
US1136321A
|
|
Machine for calculation and printing the results of said calculations.
|
|
GB191106386A
|
|
Improvements in and relating to Calculating Machines.
|
|
GB191106286A
|
|
Improvements in and relating to Key Buttons for Typewriters and similar Machines.
|
|
GB191106067A
|
|
Improvements in and relating to Ribbon-winding Mechanism for Typewriters, Calculators and the like.
|
|
US1065673A
|
|
Operating-keys for adding and listing machines.
|
|
US1018176A
|
|
Ribbon winding and reversing mechanism.
|
|
US1197276A
|
|
Combined adding-machine and type-writer.
|
|
GB190928898A
|
|
Improvements in and relating to Printing Devices suitable for Mechanical Calculators.
|
|
GB190828253A
|
|
Improvements in and relating to Mechanical Calculators.
|
|
GB190929891A
|
|
Improvements in and relating to Mechanical Calculators.
|
|
GB190405683A
|
|
Improvements in Type-writing Machines.
|
|
US754366A
|
|
Type-writing machine.
|
|
US1065792A
|
|
Total-signal device.
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