US2821342A
(en )
1958-01-28
Capellaro
GB606629A
(enrdf_load_stackoverflow )
US2087182A
(en )
1937-07-13
Listing adding machine
US3009634A
(en )
1961-11-21
Allward
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(en )
1961-11-14
Complemental keyboard
US2364769A
(en )
1944-12-12
Accounting machine
GB479234A
(enrdf_load_stackoverflow )
1900-01-01
US3018044A
(en )
1962-01-23
anderson
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(en )
1917-03-06
Calculator.
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(en )
1964-04-28
- calculating machine with storing mechanism
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(en )
1952-10-21
Totalizer actuator control mechanism
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(en )
1921-11-08
magnus
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(en )
1962-01-02
Totalizing control means
GB701905A
(enrdf_load_stackoverflow )
GB191219273A
(en )
1913-03-13
Improvements in the Keyboards and Connecting Members of Calculating Machines.
GB730465A
(enrdf_load_stackoverflow )
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(en )
1914-03-05
Improvements in and relating to Adding and Listing Machines.
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(enrdf_load_stackoverflow )
GB469034A
(enrdf_load_stackoverflow )
GB668507A
(enrdf_load_stackoverflow )
GB787507A
(enrdf_load_stackoverflow )
GB732760A
(enrdf_load_stackoverflow )
GB297717A
(enrdf_load_stackoverflow )
GB608989A
(en )
1948-09-23
Improvements in calculating machines
GB721535A
(enrdf_load_stackoverflow )