Machine for producing records on statistical cards
US1983354A
Interchangeable connection box for card tabulators
DE621159C
Switching device for engaging and disengaging clutches in office machines
US1987395A
Machine for making records on statistical cards
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Counter-pressure member for sheet feeding and like machines
US1993959A
Tabulating, typewriting, or like printing machine
US1969332A
Method of forming records in record cards or the like, particularly for use in statistical or like machines
DE583599C
Counting device for statistical machines with facility for printing the counting information
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Ink ribbon feed mechanism
GB350518A
Improvements in or relating to keyboard controlled machines
GB350001A
Improvements in or relating to keyboard operated machines such as typewriters and machines for punching or otherwise forming records on statistical cards
DE552480C
Card punching machine with automatic return of the setting slide
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Card perforating machine or the like
GB331847A
Improvements in or relating to sorting machines for statistical cards or the like
GB328414A
Improvements in or relating to paper feed mechanism for tabulating or other printing machines
GB328413A
Improvements in or relating to paper feed mechanism for tabulating or other printing machines
GB328281A
Improvements in or relating to card perforating machines or the like
GB328294A
Improvements in or relating to counting apparatus for counting perforated statistical cards
GB328293A
Improvements in or relating to sorting machines for statistical or like perforated cards
GB328282A
Improvements in or relating to paper feed mechanism for tabulating or other printing machines
