US3138091A
(en )
1964-06-23
Printing machines
GB414248A
(enrdf_load_stackoverflow )
US2372886A
(en )
1945-04-03
Typewriting machine
US2079355A
(en )
1937-05-04
Automatic overdraft device for
US1601398A
(en )
1926-09-28
- cincinnati
GB430251A
(en )
1935-06-17
Improvements in or relating to machines for verifying perforated record cards
US2854123A
(en )
1958-09-30
Power operated tabulating mechanism
US2433679A
(en )
1947-12-30
Indian currency computing and recording calculator
US1049818A
(en )
1913-01-07
Retraction-lock for combined type-writers and adders.
GB650357A
(en )
1951-02-21
Differential setting mechanism for cash registers or similar accounting machines
US1794464A
(en )
1931-03-03
Combined typewriting anb computing machine
US1274730A
(en )
1918-08-06
Lock-actuator for total-proof devices on computing-machines.
US2413884A
(en )
1947-01-07
Manually controlled record punching machine
US1234368A
(en )
1917-07-24
Computing mechanism.
GB509444A
(enrdf_load_stackoverflow )
US1485881A
(en )
1924-03-04
Calculating machine
US2308924A
(en )
1943-01-19
Typewriting calculating machine
US1285150A
(en )
1918-11-19
Combined type-writing and computing machine.
US1883892A
(en )
1932-10-25
Walther flach
GB783849A
(enrdf_load_stackoverflow )
US1801470A
(en )
1931-04-21
Writing-computing machine
US2693753A
(en )
1954-11-09
Zero printing control for interpreters
US970798A
(en )
1910-09-20
Cash-register.
GB128965A
(en )
1919-07-10
Improvements in Adding Machines.
GB459812A
(enrdf_load_stackoverflow )