GB362529A
(en )
1931-12-10
Improvements in or relating to punching machines for perforating statistical record cards
GB683691A
(enExample )
US1950476A
(en )
1934-03-13
Card perforating machine
GB745482A
(en )
1956-02-29
Key-controlled perforating machines
GB617358A
(en )
1949-02-04
Improvements in or relating to machines used in perforating cards for use in statistical machines
GB710928A
(en )
1954-06-23
Improvements in or relating to record card punching machines
US2708971A
(en )
1955-05-24
Deck shift control for a card punch
US2228464A
(en )
1941-01-14
Sheet perforating device
US1763163A
(en )
1930-06-10
Automatic visible-card perforator
US3494051A
(en )
1970-02-10
Keyboard apparatus for teaching machine
US829932A
(en )
1906-08-28
Apparatus for perforating paper strips or the like.
US3737915A
(en )
1973-06-05
Apparatus for automatic recording of successive measurements such as bowling pin status
GB224290A
(enExample )
US2969432A
(en )
1961-01-24
Non-interfering tape feed-out mechanism
US1844811A
(en )
1932-02-09
Card perforating machine or the like
US1182179A
(en )
1916-05-09
Perforator for forming telegraphic tape.
US1983154A
(en )
1934-12-04
Keyboard operated machine
US3375973A
(en )
1968-04-02
Data apparatus
US1807627A
(en )
1931-06-02
Carriage return for punching machines
US1717230A
(en )
1929-06-11
Printing machine
US1965975A
(en )
1934-07-10
Gang punch
US3327940A
(en )
1967-06-27
Automatic card notcher
GB558793A
(en )
1944-01-21
Improvements in or relating to printing machines
GB595939A
(en )
1947-12-23
Improvements in or relating to statistical card punching machines
US2701522A
(en )
1955-02-08
Mechanism for stamping and feeding a paper tape