GB484821A
(enrdf_load_stackoverflow )
US2087182A
(en )
1937-07-13
Listing adding machine
GB295632A
(enrdf_load_stackoverflow )
GB417991A
(enrdf_load_stackoverflow )
1900-01-01
GB693659A
(enrdf_load_stackoverflow )
GB628636A
(enrdf_load_stackoverflow )
GB293080A
(enrdf_load_stackoverflow )
GB545438A
(enrdf_load_stackoverflow )
GB305579A
(enrdf_load_stackoverflow )
GB497640A
(enrdf_load_stackoverflow )
GB334727A
(enrdf_load_stackoverflow )
GB499027A
(enrdf_load_stackoverflow )
GB285885A
(enrdf_load_stackoverflow )
GB483113A
(enrdf_load_stackoverflow )
GB394999A
(enrdf_load_stackoverflow )
GB540312A
(enrdf_load_stackoverflow )
GB144685A
(en )
1921-04-07
Improvements in printing mechanism for calculating machines
GB608989A
(en )
1948-09-23
Improvements in calculating machines
GB241213A
(enrdf_load_stackoverflow )
GB464746A
(enrdf_load_stackoverflow )
GB483093A
(enrdf_load_stackoverflow )
GB420807A
(enrdf_load_stackoverflow )
1900-01-01
GB438369A
(enrdf_load_stackoverflow )
GB454463A
(enrdf_load_stackoverflow )
GB1030318A
(enrdf_load_stackoverflow )