US2226960A
(en )
1940-12-31
Accounting machine
GB939893A
(enrdf_load_stackoverflow )
US2121683A
(en )
1938-06-21
Calculating machine
US2055623A
(en )
1936-09-29
Calculating machine
US3086701A
(en )
1963-04-23
Capellaro
US2365874A
(en )
1944-12-26
Computing machine
GB191219273A
(en )
1913-03-13
Improvements in the Keyboards and Connecting Members of Calculating Machines.
GB447485A
(enrdf_load_stackoverflow )
GB416498A
(enrdf_load_stackoverflow )
GB608989A
(en )
1948-09-23
Improvements in calculating machines
GB732239A
(enrdf_load_stackoverflow )
GB768516A
(enrdf_load_stackoverflow )
GB191403084A
(en )
1915-02-04
Improvements in Adding Machines.
GB191211644A
(en )
1913-01-09
Combined Typewriting and Computing Machines.
GB749504A
(enrdf_load_stackoverflow )
GB431623A
(enrdf_load_stackoverflow )
GB305579A
(enrdf_load_stackoverflow )
GB931679A
(en )
1963-07-17
A ten-key calculating machine
GB265122A
(enrdf_load_stackoverflow )
GB191506359A
(en )
1916-04-27
Improvements in Locking Mechanism for Key Controlled Machines such as Cash Registers and the like.
GB555659A
(en )
1943-09-01
Improvements in or relating to calculating or like machines
GB474938A
(enrdf_load_stackoverflow )
GB362451A
(enrdf_load_stackoverflow )
GB181664A
(enrdf_load_stackoverflow )
GB629975A
(enrdf_load_stackoverflow )