US2978086A
(en )
1961-04-04
Key operated machines
US1834561A
(en )
1931-12-01
Accounting machine and punching mechanism controlled thereby
US2110854A
(en )
1938-03-15
Department store machine
US1976352A
(en )
1934-10-09
Perforating machine for records
US2816609A
(en )
1957-12-17
Tape perforating machine
GB445846A
(en )
1936-04-06
Improvements in or relating to code translating apparatus
GB352950A
(en )
1931-07-14
Improvements in or relating to machines for punching statistical record cards
US2399724A
(en )
1946-05-07
Alphabet printing mechanism
GB745482A
(en )
1956-02-29
Key-controlled perforating machines
US2996245A
(en )
1961-08-15
Punching and reading apparatus for calculating machines
GB529647A
(en )
1940-11-26
Improvements in or relating to apparatus for recording on statistical record cards
US2988269A
(en )
1961-06-13
Reichert
US3183829A
(en )
1965-05-18
Check writing machine
US3018040A
(en )
1962-01-23
Combined business machine and tape perforator
US2994473A
(en )
1961-08-01
Machine for punching tabulating cards in connection with credit sales involving a charge plate
US3084013A
(en )
1963-04-02
brett
US3018039A
(en )
1962-01-23
Code read-in translator for controlling lister-calculating machines
GB965777A
(en )
1964-08-06
Improvements in keyboard-operated mechanisms
US1989887A
(en )
1935-02-05
Combination hole punch
US2213573A
(en )
1940-09-03
Recording lock
US2126595A
(en )
1938-08-09
Record controlled tabulator type
US2013530A
(en )
1935-09-03
Time recording punch
US3268162A
(en )
1966-08-23
Data source recorder
US3515338A
(en )
1970-06-02
Typewriter controlled recording apparatus
GB617358A
(en )
1949-02-04
Improvements in or relating to machines used in perforating cards for use in statistical machines