US2071141A
(en )
1937-02-16
Joht doe
GB1113936A
(https= )
US2230682A
(en )
1941-02-04
Interlock for cash registers
US2079355A
(en )
1937-05-04
Automatic overdraft device for
US3323717A
(en )
1967-06-06
Control device for a ten key adding printing machine
US2202948A
(en )
1940-06-04
Calculating machine
US1938907A
(en )
1933-12-12
Calculating machine
GB427722A
(https= )
GB553057A
(https= )
US2038717A
(en )
1936-04-28
Calculating machine
US2827145A
(en )
1958-03-18
Paper feeding means for an accounting machine
GB147762A
(en )
1921-08-04
Improvements in or relating to calculating machines
US1601398A
(en )
1926-09-28
- cincinnati
US2015749A
(en )
1935-10-01
Cash register
GB438369A
(https= )
US1761555A
(en )
1930-06-03
A cqbposation of mary
US2134683A
(en )
1938-11-01
Calculating machine
GB648389A
(https= )
US963727A
(en )
1910-07-05
Calculating attachment for type-writing machines.
US1755504A
(en )
1930-04-22
Case register
US1843648A
(en )
1932-02-02
Adding machine
US2798672A
(en )
1957-07-09
Machine for calculating avoirdupois weights
GB285885A
(https= )
GB608988A
(https= )
GB191219273A
(en )
1913-03-13
Improvements in the Keyboards and Connecting Members of Calculating Machines.