GB551994A
(enrdf_load_stackoverflow )
US1835170A
(en )
1931-12-08
Total key mechanism
US2203115A
(en )
1940-06-04
Cash register
GB481443A
(enrdf_load_stackoverflow )
US1791899A
(en )
1931-02-10
Xwtlhelm k khopff
GB909935A
(en )
1962-11-07
Calculating or similar accounting machine
US2702622A
(en )
1955-02-22
Paper feeding means in accounting machines
US2371826A
(en )
1945-03-20
Coupling device for typewriting
GB191115177A
(enrdf_load_stackoverflow )
GB431961A
(enrdf_load_stackoverflow )
US1774924A
(en )
1930-09-02
Ehnst kassner
GB497640A
(enrdf_load_stackoverflow )
GB668035A
(enrdf_load_stackoverflow )
GB262617A
(enrdf_load_stackoverflow )
GB347271A
(enrdf_load_stackoverflow )
GB509042A
(enrdf_load_stackoverflow )
GB159610A
(enrdf_load_stackoverflow )
GB464133A
(enrdf_load_stackoverflow )
GB451011A
(enrdf_load_stackoverflow )
GB295632A
(enrdf_load_stackoverflow )
GB712751A
(enrdf_load_stackoverflow )
GB389630A
(enrdf_load_stackoverflow )
1900-01-01
GB243734A
(enrdf_load_stackoverflow )
GB191403084A
(en )
1915-02-04
Improvements in Adding Machines.
GB487494A
(enrdf_load_stackoverflow )