GB1004128A
(en )
1965-09-08
Improvements in or relating to keyboard operated machines
GB539372A
(https= )
US2831558A
(en )
1958-04-22
Variable proportional letter feed mechanism
US3294117A
(en )
1966-12-27
Selector arrangement for typewriters having fewer operating means than typelevers
US2284803A
(en )
1942-06-02
Listing adding machine
CA1058546A
(en )
1979-07-17
Three positions ribbon guide mechanism
GB868453A
(en )
1961-05-17
Improvements in or relating to typewriters and the like including tabulating mechanisms
GB966040A
(en )
1964-08-06
Character wire printer
US2850136A
(en )
1958-09-02
Typewriter key connecting devices
US1994639A
(en )
1935-03-19
Column register for calculating
US1478600A
(en )
1923-12-25
Silent-key typewriter attachment
US2603417A
(en )
1952-07-15
Carriage position control means for
US3603443A
(en )
1971-09-07
Selective ribbon-handling mechanism for carbon and fabric ribbons
US2541191A
(en )
1951-02-13
Ribbon vibrating mechanism for typewriting and like machines
US1951453A
(en )
1934-03-20
Typewriting machine
GB1154111A
(en )
1969-06-04
Encoder.
US2905304A
(en )
1959-09-22
Rotary proportional escapement
US2705068A
(en )
1955-03-29
Split platen paper feed mechanism
US2620915A
(en )
1952-12-09
Selective word printing device
GB362433A
(https= )
US2049826A
(en )
1936-08-04
Carriage-feeding device for typewriters
US1018285A
(en )
1912-02-20
Adding and listing machine.
US3722651A
(en )
1973-03-27
Keyboard
US2928517A
(en )
1960-03-15
Carriage shift for business machines
GB190425431A
(en )
1905-09-14
Improvements in Typewriting and other Key-actuated Machines.