GB451244A
(https= )
US2821342A
(en )
1958-01-28
Capellaro
US3156411A
(en )
1964-11-10
moevoy
US1909715A
(en )
1933-05-16
pasinski
US2250837A
(en )
1941-07-29
Calculating machine
US2364769A
(en )
1944-12-12
Accounting machine
US1864273A
(en )
1932-06-21
Accounting machine
US3023951A
(en )
1962-03-06
Control apparatus for accounting machines
US2291949A
(en )
1942-08-04
Listing adding machine
US2718354A
(en )
1955-09-20
sharpe
US3042294A
(en )
1962-07-03
Calculating machine with instruction modifying mechanism
GB440108A
(https= )
US2086749A
(en )
1937-07-13
Bookkeeping machine
US2170183A
(en )
1939-08-22
Cash register and accounting
US1883892A
(en )
1932-10-25
Walther flach
US1396716A
(en )
1921-11-08
magnus
GB190828253A
(en )
1909-12-28
Improvements in and relating to Mechanical Calculators.
US2894615A
(en )
1959-07-14
Carriage movement controls for accounting machines
GB297717A
(https= )
GB491381A
(en )
1938-08-29
Improvements in or relating to means for controlling the printing mechanism of calculating or statistical machines
GB506500A
(https= )
GB272467A
(https= )
GB668507A
(https= )
GB810797A
(https= )
GB617346A
(https= )