US2221861A
(en )
1940-11-19
Calculating machine
GB483113A
(enrdf_load_stackoverflow )
US2261341A
(en )
1941-11-04
Adding and listing machine
US2199253A
(en )
1940-04-30
Transfer mechanism for key-set
GB628636A
(enrdf_load_stackoverflow )
GB497640A
(enrdf_load_stackoverflow )
GB406152A
(enrdf_load_stackoverflow )
1900-01-01
GB293080A
(enrdf_load_stackoverflow )
GB473624A
(enrdf_load_stackoverflow )
GB703886A
(enrdf_load_stackoverflow )
1900-01-01
GB509042A
(enrdf_load_stackoverflow )
GB416498A
(enrdf_load_stackoverflow )
GB215746A
(en )
1925-08-04
Improvements in cash registers and like machines
GB611603A
(enrdf_load_stackoverflow )
GB508141A
(enrdf_load_stackoverflow )
GB434369A
(enrdf_load_stackoverflow )
GB420807A
(enrdf_load_stackoverflow )
1900-01-01
GB447485A
(enrdf_load_stackoverflow )
GB607744A
(enrdf_load_stackoverflow )
GB540312A
(enrdf_load_stackoverflow )
GB193406A
(enrdf_load_stackoverflow )
GB206798A
(enrdf_load_stackoverflow )
GB540311A
(enrdf_load_stackoverflow )
GB191121592A
(en )
1912-09-26
Improvements in or relating to Adding Machines.
GB499027A
(enrdf_load_stackoverflow )