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
GB259069A
(https= )
US2955755A
(en )
1960-10-11
Electro-mechanical storage, transfer, and read-out device
GB445846A
(en )
1936-04-06
Improvements in or relating to code translating apparatus
US3010387A
(en )
1961-11-28
Printing machines
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
US2988269A
(en )
1961-06-13
Reichert
US1506381A
(en )
1924-08-26
Method of and apparatus for perforating record sheets
US3183829A
(en )
1965-05-18
Check writing machine
US2736023A
(en )
1956-02-21
La vergne h
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