US2221861A
(en )
1940-11-19
Calculating machine
GB753419A
(https= )
US3045799A
(en )
1962-07-24
Keyboard interlock control means
US1913510A
(en )
1933-06-13
Calculating machine
US1914401A
(en )
1933-06-20
Calculating machine
US3121487A
(en )
1964-02-18
Paper carriage control mechanism for accounting machines
US2926846A
(en )
1960-03-01
Predetermined carriage shifting and dividend
US2364769A
(en )
1944-12-12
Accounting machine
GB900541A
(en )
1962-07-04
Document sorting and accounting systems and apparatus
US3331556A
(en )
1967-07-18
Power driving device for a calculating machine
US2577395A
(en )
1951-12-04
Autographic eegister
US1115889A
(en )
1914-11-03
Adding and listing machine.
US1294704A
(en )
1919-02-18
Elimination and special-signal mechanism.
US3410386A
(en )
1968-11-12
Record material feed control
GB749504A
(https= )
GB285885A
(https= )
US1966657A
(en )
1934-07-17
von pein
GB497640A
(https= )
US2894615A
(en )
1959-07-14
Carriage movement controls for accounting machines
US3633819A
(en )
1972-01-11
Automatic repeat mechanism
US3144822A
(en )
1964-08-18
Symbol printing control for accounting machines
US2905306A
(en )
1959-09-22
Carriage movement controlling mechanism
GB822428A
(https= )
GB499027A
(https= )
GB907591A
(https= )