GB750454A
(en )
1956-06-13
Improvements in or relating to tape controlled typewriter
GB523532A
(en )
1940-07-17
Improvements in totalizers for calculating machines
US2734614A
(en )
1956-02-14
Proportional ribbon feed mechanism
US2831558A
(en )
1958-04-22
Variable proportional letter feed mechanism
US4108557A
(en )
1978-08-22
Error correcting typewriter
GB461347A
(enrdf_load_stackoverflow )
US3021937A
(en )
1962-02-20
Selective interlock mechanism
US2905303A
(en )
1959-09-22
Escapement pawl control
US3706366A
(en )
1972-12-19
Repeat typing mechanism for power operated typewriters
US1942216A
(en )
1934-01-02
Paper carriage equipment for
GB497833A
(enrdf_load_stackoverflow )
US2800213A
(en )
1957-07-23
Automatic underscoring mechanism
US2580318A
(en )
1951-12-25
Power operated tabulating mechanism for typewriting machines
GB425691A
(en )
1935-03-20
Improvements in or relating to power operated typewriters
US2558413A
(en )
1951-06-26
Carriage rebound checking device
US2330960A
(en )
1943-10-05
Typewriting machine
US2702622A
(en )
1955-02-22
Paper feeding means in accounting machines
US3021935A
(en )
1962-02-20
Mechanical interlock device
US1933550A
(en )
1933-11-07
Typewriting machine
US2711855A
(en )
1955-06-28
Automatic non-tabulating mechanism for accounting machines
US1497977A
(en )
1924-06-17
Typewriter
GB190425432A
(en )
1905-09-21
Improvements in Typewriting and other Key-actuated Machines.
US998861A
(en )
1911-07-25
Type-writing machine.
US2499053A
(en )
1950-02-28
Automatic locking and releasing device for shift keys on typewriters
US2318425A
(en )
1943-05-04
Combined typewriting and computing machine