GB783869A
(enrdf_load_stackoverflow )
US2905303A
(en )
1959-09-22
Escapement pawl control
GB375884A
(en )
1932-07-07
Improvements in or relating to machines for printing on, and perforating, record cards
US2383260A
(en )
1945-08-21
Typewriting machine
US2216627A
(en )
1940-10-01
Combined typewriting and computing
US3664478A
(en )
1972-05-23
Mutual locking device for an office machine with electric keyboard
US2580318A
(en )
1951-12-25
Power operated tabulating mechanism for typewriting machines
US2633966A
(en )
1953-04-07
Operation control interlocking mechanism for typewriters or like machines
GB425691A
(en )
1935-03-20
Improvements in or relating to power operated typewriters
US2577395A
(en )
1951-12-04
Autographic eegister
US2702622A
(en )
1955-02-22
Paper feeding means in accounting machines
US2521478A
(en )
1950-09-05
Power-actuated typewriter
US2570931A
(en )
1951-10-09
Printing tabulating mechanism
US2107142A
(en )
1938-02-01
Listing adding machine
GB631379A
(enrdf_load_stackoverflow )
US3072325A
(en )
1963-01-08
Kohler etai
US2025956A
(en )
1935-12-31
Computing machine
US2718354A
(en )
1955-09-20
sharpe
US2749040A
(en )
1956-06-05
Motor bar interlock
US1596022A
(en )
1926-08-17
Typewriting machine
GB819283A
(enrdf_load_stackoverflow )
GB190303259A
(en )
1903-08-06
Improvements in Adding and Recording Machines.
US667649A
(en )
1901-02-05
Type-writer.
US1294727A
(en )
1919-02-18
Combined type-writing and computing machine.
US3135463A
(en )
1964-06-02
tingley