US2224203A
(en )
1940-12-10
Locking mechanism for calculating
GB445572A
(https= )
US2731197A
(en )
1956-01-17
Pin box control mechanism
US2905303A
(en )
1959-09-22
Escapement pawl control
US2945578A
(en )
1960-07-19
Variable spacing mechanism for typewriters
US2971625A
(en )
1961-02-14
Repeat actuation arrangement for typewriters
US2033045A
(en )
1936-03-03
Computing machine
US2330960A
(en )
1943-10-05
Typewriting machine
US2558413A
(en )
1951-06-26
Carriage rebound checking device
US2905306A
(en )
1959-09-22
Carriage movement controlling mechanism
US2854123A
(en )
1958-09-30
Power operated tabulating mechanism
US2702622A
(en )
1955-02-22
Paper feeding means in accounting machines
US3042294A
(en )
1962-07-03
Calculating machine with instruction modifying mechanism
US1134958A
(en )
1915-04-06
Adding and recording machine.
US2055561A
(en )
1936-09-29
Typewriter
US2684808A
(en )
1954-07-27
Automatic spacing stroke control mechanism for accounting machines
US1915624A
(en )
1933-06-27
shipley
US1933550A
(en )
1933-11-07
Typewriting machine
GB748825A
(en )
1956-05-09
Improvements in or relating to tabulator mechanism of a typewriter or like machine
GB297717A
(https= )
US3015437A
(en )
1962-01-02
Totalizing control means
GB191121592A
(en )
1912-09-26
Improvements in or relating to Adding Machines.
US1488058A
(en )
1924-03-25
Calculating machine
US1935609A
(en )
1933-11-21
Total key unlocking means for adding machines
GB1088709A
(en )
1967-10-25
Margin setting device for a typewriter