GB474938A
(enrdf_load_stackoverflow )
GB732760A
(enrdf_load_stackoverflow )
GB608989A
(en )
1948-09-23
Improvements in calculating machines
US1738144A
(en )
1929-12-03
morton
GB285885A
(enrdf_load_stackoverflow )
GB1122887A
(en )
1968-08-07
A data entry machine
GB497640A
(enrdf_load_stackoverflow )
GB852822A
(enrdf_load_stackoverflow )
GB487494A
(enrdf_load_stackoverflow )
GB191311823A
(en )
1914-03-05
Improvements in and relating to Adding and Listing Machines.
US2055623A
(en )
1936-09-29
Calculating machine
GB420807A
(enrdf_load_stackoverflow )
1900-01-01
GB191219273A
(en )
1913-03-13
Improvements in the Keyboards and Connecting Members of Calculating Machines.
GB305579A
(enrdf_load_stackoverflow )
GB628636A
(enrdf_load_stackoverflow )
GB484821A
(enrdf_load_stackoverflow )
GB265122A
(enrdf_load_stackoverflow )
GB508141A
(enrdf_load_stackoverflow )
GB368311A
(enrdf_load_stackoverflow )
GB483093A
(enrdf_load_stackoverflow )
GB903879A
(enrdf_load_stackoverflow )
GB394999A
(enrdf_load_stackoverflow )
GB241213A
(enrdf_load_stackoverflow )
GB499027A
(enrdf_load_stackoverflow )
GB297717A
(enrdf_load_stackoverflow )