GB464746A
(enrdf_load_stackoverflow )
US2087182A
(en )
1937-07-13
Listing adding machine
US2055623A
(en )
1936-09-29
Calculating machine
GB406152A
(enrdf_load_stackoverflow )
1900-01-01
GB431961A
(enrdf_load_stackoverflow )
GB447485A
(enrdf_load_stackoverflow )
GB608989A
(en )
1948-09-23
Improvements in calculating machines
GB351698A
(enrdf_load_stackoverflow )
GB411291A
(enrdf_load_stackoverflow )
GB389632A
(enrdf_load_stackoverflow )
GB181664A
(enrdf_load_stackoverflow )
GB499027A
(enrdf_load_stackoverflow )
GB484821A
(enrdf_load_stackoverflow )
GB279423A
(enrdf_load_stackoverflow )
GB413205A
(enrdf_load_stackoverflow )
1900-01-01
GB762003A
(enrdf_load_stackoverflow )
GB852822A
(enrdf_load_stackoverflow )
GB292619A
(enrdf_load_stackoverflow )
GB628064A
(enrdf_load_stackoverflow )
GB434369A
(enrdf_load_stackoverflow )
GB693659A
(enrdf_load_stackoverflow )
GB295632A
(enrdf_load_stackoverflow )
GB420807A
(enrdf_load_stackoverflow )
1900-01-01
GB190727269A
(en )
1908-10-09
Improvements in or relating to Adding Machines.
GB483113A
(enrdf_load_stackoverflow )