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GB123779A
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Improvements in and relating to Calculating Machines.
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GB130007A
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Improvements in and relating to Calculating Machines.
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GB123780A
|
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Improvements in and relating to Calculating Machines.
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GB119534A
|
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Improvements in and relating to Calculating and like Machines.
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GB112351A
|
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Improvements in and relating to Calculating Machines.
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GB113841A
|
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Improvements in and relating to Calculating Machines.
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US1232020A
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Calculator restoring mechanism.
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US1232019A
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Full-stroke device for calculators.
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US1232018A
|
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Restoring mechanism for calculators.
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CA174559A
|
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Adding machine
|
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GB101101A
|
|
Improvements in and relating to Operating Handles for use with Calculating and Similar Machines.
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|
GB191517792A
|
|
Improvements in and relating to Calculating Machines.
|
|
GB191516921A
|
|
Improvements in and relating to the Operating Mechanism of Calculating and like Machines.
|
|
US1231981A
|
|
Handle for calculators.
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|
GB191515573A
|
|
Improvements in and relating to Calculating Machines.
|
|
US1232009A
|
|
Safety-lock for calculator rack and type plates.
|
|
US1232008A
|
|
Flexible handle-pull for calculators.
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|
US1232007A
|
|
Totalizing means for calculators.
|
|
GB191512460A
|
|
Improvements in and relating to the Carrying or Transfer Mechanism of Calculating Machines.
|
|
CA177604A
|
|
Calculator
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