US2734614A
(en )
1956-02-14
Proportional ribbon feed mechanism
GB424149A
(en )
1935-02-15
Improvements in or relating to release control mechanism for calculating machines, accounting machines, and similar machines
GB461423A
(enrdf_load_stackoverflow )
GB1048275A
(en )
1966-11-16
Improvements in or relating to keyboard mechanism for an electric writing machine
US2710139A
(en )
1955-06-07
Swanson
US2383260A
(en )
1945-08-21
Typewriting machine
US2728435A
(en )
1955-12-27
Repeat operation mechanism for power driven typewriters or like machines
US2733858A
(en )
1956-02-07
anderson
US2731197A
(en )
1956-01-17
Pin box control mechanism
US2216627A
(en )
1940-10-01
Combined typewriting and computing
GB425691A
(en )
1935-03-20
Improvements in or relating to power operated typewriters
US3752289A
(en )
1973-08-14
Typewriter escapement and control devices therefor
GB1151808A
(en )
1969-05-14
Pulse-Operated Line Printer for Electronic Data-Processing Installations.
US1945027A
(en )
1934-01-30
Listing calculator
US3578132A
(en )
1971-05-11
Half-space carriage return mechanism for typewriters
US2570931A
(en )
1951-10-09
Printing tabulating mechanism
US2730039A
(en )
1956-01-10
werner
US2055561A
(en )
1936-09-29
Typewriter
US2107142A
(en )
1938-02-01
Listing adding machine
GB555659A
(en )
1943-09-01
Improvements in or relating to calculating or like machines
US1708066A
(en )
1929-04-09
Means of shifting the platen or the like in typewriters
US2318425A
(en )
1943-05-04
Combined typewriting and computing machine
GB748825A
(en )
1956-05-09
Improvements in or relating to tabulator mechanism of a typewriter or like machine
US2711855A
(en )
1955-06-28
Automatic non-tabulating mechanism for accounting machines
US2899893A
(en )
1959-08-18
werner