GB443840A
(en )
1936-03-06
Improvements in or relating to statistical recording machines
GB588491A
(en )
1947-05-22
Improvements in or relating to record-card controlled accounting machines
GB542362A
(https= )
US2877081A
(en )
1959-03-10
Card positioning means
GB229937A
(https= )
GB337478A
(https= )
GB909935A
(en )
1962-11-07
Calculating or similar accounting machine
US2960164A
(en )
1960-11-15
Apparatus for checking recorded information
GB551994A
(https= )
GB739005A
(https= )
GB776409A
(en )
1957-06-05
Printing unit, especially for record controlled business machines
GB295632A
(https= )
GB820710A
(en )
1959-09-23
Improvements in card punches
GB144543A
(https= )
GB202098A
(https= )
GB228632A
(https= )
GB671841A
(https= )
GB243734A
(https= )
GB464133A
(https= )
US2307177A
(en )
1943-01-05
Punching machine
GB259470A
(https= )
GB183867A
(en )
1922-07-26
Improvements relating to apparatus for compiling and printing statistics from perforated record cards
US2797867A
(en )
1957-07-02
Code translating mechanism
GB1122209A
(en )
1968-07-31
Print hammer mechanism
GB154248A
(en )
1920-11-29
Improvements in and relating to calculating machines