GB669844A
(en )
1952-04-09
Improvements in or relating to telegraphic tape-recording apparatus
US2424359A
(en )
1947-07-22
Adding machine
GB452472A
(https= )
US3081938A
(en )
1963-03-19
Wai thfr c-tai
US2570931A
(en )
1951-10-09
Printing tabulating mechanism
US1630814A
(en )
1927-05-31
Cash register
GB190412544A
(en )
1904-08-25
Improvements relating to Cash Registers.
US3620446A
(en )
1971-11-16
Printing device for a calculating machine
GB570356A
(en )
1945-07-03
Improvements in or relating to machines for making records on statistical cards
GB601099A
(en )
1948-04-27
Improvements in or relating to statistical machines
GB604165A
(https= )
US2055623A
(en )
1936-09-29
Calculating machine
GB545438A
(https= )
GB344393A
(https= )
GB660615A
(https= )
GB518840A
(https= )
GB165846A
(en )
1921-07-11
Improvements in and relating to total taking machines for compiling statistics from perforated record cards
GB677950A
(https= )
GB555659A
(en )
1943-09-01
Improvements in or relating to calculating or like machines
GB420807A
(https= )
1900-01-01
GB241213A
(https= )
GB558793A
(en )
1944-01-21
Improvements in or relating to printing machines
GB614347A
(en )
1948-12-14
Improvements in or relating to cash registers and similiar accounting machines
GB732239A
(https= )
GB631379A
(https= )