US2221861A
(en )
1940-11-19
Calculating machine
GB223866A
(https= )
US1791899A
(en )
1931-02-10
Xwtlhelm k khopff
US1682196A
(en )
1928-08-28
Cash register
US3001695A
(en )
1961-09-26
Totalizer controlling mechanism for cash registers and accounting machines
US2027449A
(en )
1936-01-14
Calculating machine and cash
US1630814A
(en )
1927-05-31
Cash register
US3086701A
(en )
1963-04-23
Capellaro
US2229771A
(en )
1941-01-28
Cash register
US1956569A
(en )
1934-05-01
Adding and listing machine
US3537641A
(en )
1970-11-03
Totalizer control mechanism
GB420807A
(https= )
1900-01-01
GB417991A
(https= )
1900-01-01
GB539453A
(https= )
GB144685A
(en )
1921-04-07
Improvements in printing mechanism for calculating machines
GB497640A
(https= )
GB389630A
(https= )
1900-01-01
GB190828253A
(en )
1909-12-28
Improvements in and relating to Mechanical Calculators.
GB445877A
(en )
1936-04-20
Improvements in or relating to calculating or the like machines
GB295632A
(https= )
GB285885A
(https= )
GB459812A
(https= )
GB438369A
(https= )
GB456157A
(en )
1936-11-04
Improvements in and relating to computing and printing machines having bichrome ribbons
GB500580A
(en )
1939-02-13
Improvements in or relating to calculating machines