GB629975A
(enrdf_load_stackoverflow )
US2330689A
(en )
1943-09-28
Register
US2087182A
(en )
1937-07-13
Listing adding machine
GB1386329A
(en )
1975-03-05
Code keyboard for typewriters and similar office machines
US2261341A
(en )
1941-11-04
Adding and listing machine
US2570931A
(en )
1951-10-09
Printing tabulating mechanism
GB406152A
(enrdf_load_stackoverflow )
1900-01-01
GB497640A
(enrdf_load_stackoverflow )
GB608694A
(enrdf_load_stackoverflow )
GB749504A
(enrdf_load_stackoverflow )
GB191219273A
(en )
1913-03-13
Improvements in the Keyboards and Connecting Members of Calculating Machines.
US2809782A
(en )
1957-10-15
fleming
GB508141A
(enrdf_load_stackoverflow )
GB607744A
(enrdf_load_stackoverflow )
GB389630A
(enrdf_load_stackoverflow )
1900-01-01
GB374109A
(enrdf_load_stackoverflow )
GB483113A
(enrdf_load_stackoverflow )
GB838252A
(enrdf_load_stackoverflow )
GB416498A
(enrdf_load_stackoverflow )
GB496720A
(enrdf_load_stackoverflow )
GB420807A
(enrdf_load_stackoverflow )
1900-01-01
GB191511254A
(en )
1916-08-04
Improvements in Combined Typewriting and Computing Machines.
GB537735A
(enrdf_load_stackoverflow )
GB478432A
(enrdf_load_stackoverflow )
GB295632A
(enrdf_load_stackoverflow )