SE307141B
(enExample )
1968-12-23
GB549960A
(enExample )
GB899368A
(en )
1962-06-20
Improved key operating machine
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
GB144685A
(en )
1921-04-07
Improvements in printing mechanism for calculating machines
US2365874A
(en )
1944-12-26
Computing machine
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.
GB459812A
(enExample )
US3669236A
(en )
1972-06-13
Keyboard for a printing machine
GB545438A
(enExample )
GB522721A
(en )
1940-06-25
Improvements relating to calculating machines
GB518617A
(enExample )
US1935609A
(en )
1933-11-21
Total key unlocking means for adding machines
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 )
ES257364A1
(es )
1960-08-16
Un mecanismo para destrabar las palancas portatipos en maquinas de escribir
GB292619A
(enExample )
GB191515573A
(en )
1916-11-02
Improvements in and relating to Calculating Machines.
GB265136A
(en )
1927-08-26
An improved keyboard for calculating machines