US3273684A
(en )
1966-09-20
Input-output typewriter having double shift means
GB521300A
(enrdf_load_stackoverflow )
US2261341A
(en )
1941-11-04
Adding and listing machine
US2577395A
(en )
1951-12-04
Autographic eegister
US2289056A
(en )
1942-07-07
Computing machine
US3072325A
(en )
1963-01-08
Kohler etai
US2854123A
(en )
1958-09-30
Power operated tabulating mechanism
GB409101A
(enrdf_load_stackoverflow )
US2684198A
(en )
1954-07-20
H sharpf
GB386787A
(en )
1933-01-26
Improvements in tabulating mechanism for typewriting machines
GB631379A
(enrdf_load_stackoverflow )
US2702622A
(en )
1955-02-22
Paper feeding means in accounting machines
US1688939A
(en )
1928-10-23
Cash register
GB496720A
(enrdf_load_stackoverflow )
GB483113A
(enrdf_load_stackoverflow )
GB737050A
(en )
1955-09-21
Computing machine
GB838252A
(enrdf_load_stackoverflow )
GB372869A
(en )
1932-05-19
Improvements in actions for typewriting machines
GB509042A
(enrdf_load_stackoverflow )
GB374109A
(enrdf_load_stackoverflow )
GB612392A
(en )
1948-11-11
Improvements in or relating to accounting machines and similar calculating machines
GB555659A
(en )
1943-09-01
Improvements in or relating to calculating or like machines
GB508141A
(enrdf_load_stackoverflow )
GB628636A
(enrdf_load_stackoverflow )
GB749504A
(enrdf_load_stackoverflow )