GB292554A
(https= )
US1916966A
(en )
1933-07-04
Gang punch
GB352950A
(en )
1931-07-14
Improvements in or relating to machines for punching statistical record cards
GB745482A
(en )
1956-02-29
Key-controlled perforating machines
GB529647A
(en )
1940-11-26
Improvements in or relating to apparatus for recording on statistical record cards
US908971A
(en )
1909-01-05
Time-registering clock.
US2736023A
(en )
1956-02-21
La vergne h
US3019074A
(en )
1962-01-30
Time recording device and card therefor
US1906019A
(en )
1933-04-25
Numbering machine
SE321686B
(https= )
1970-03-16
US2814986A
(en )
1957-12-03
Printing perforated record card controlled machines
US3074628A
(en )
1963-01-22
Motion control arrangement for a business machine
US2266028A
(en )
1941-12-16
Printing telegraph transmitter and perforator
US3018039A
(en )
1962-01-23
Code read-in translator for controlling lister-calculating machines
GB259069A
(https= )
US2562737A
(en )
1951-07-31
Power shift mechanism for keyboard perforators and counters
US2786412A
(en )
1957-03-26
Record card controlled statistical machines
GB264224A
(https= )
GB426270A
(en )
1935-04-01
Improvements in or relating to perforated-record-controlled statistical apparatus
GB500677A
(https= )
GB293905A
(https= )
GB373992A
(https= )
GB556214A
(https= )
GB253166A
(https= )
GB824570A
(https= )