SE307141B
(enExample )
1968-12-23
GB899368A
(en )
1962-06-20
Improved key operating machine
GB969208A
(en )
1964-09-09
Type lever mechanism for power-driven keyboard-operated office machines
GB540315A
(enExample )
US3023696A
(en )
1962-03-06
Printer keyboard
US3586150A
(en )
1971-06-22
Tabulator safety apparatus
GB983549A
(en )
1965-02-17
Improvements in typewriters
GB514291A
(enExample )
GB144685A
(en )
1921-04-07
Improvements in printing mechanism for calculating machines
GB191305530A
(en )
1914-03-05
Device for Preventing the Depression of More than One Key of the same Group in Cash Registers and like Machines.
US2649250A
(en )
1953-08-18
Calculating mechanism
GB459812A
(enExample )
GB931679A
(en )
1963-07-17
A ten-key calculating machine
GB545438A
(enExample )
GB555659A
(en )
1943-09-01
Improvements in or relating to calculating or like machines
GB518617A
(enExample )
GB447485A
(enExample )
GB452787A
(enExample )
GB191316036A
(en )
1914-09-11
Improvements in and relating to Calculating Machines.
GB768516A
(enExample )
GB467784A
(en )
1937-06-23
Improved device for counting words and/or other symbols for use on typewriters or like keyboard instruments
GB540316A
(enExample )
GB759514A
(en )
1956-10-17
Improvements in or relating to fastening inserting machines
ES257364A1
(es )
1960-08-16
Un mecanismo para destrabar las palancas portatipos en maquinas de escribir
GB748852A
(en )
1956-05-09
Improvements in or relating to power-driven typewriters