GB508954A
(en )
1939-07-05
Improvements in machines for operating upon statistical cards
US3516604A
(en )
1970-06-23
Sequential keyboard interlock
US1447871A
(en )
1923-03-06
Friction drive control for tabulating machines
US3715022A
(en )
1973-02-06
Apparatus for postponing and storing key controlled functions of a typewriter
GB344393A
(enExample )
GB487494A
(enExample )
GB394999A
(enExample )
GB854504A
(en )
1960-11-23
Improvements in power-actuated typewriting calculating machines with tape-punch attachment
US1840535A
(en )
1932-01-12
shipley
GB570356A
(en )
1945-07-03
Improvements in or relating to machines for making records on statistical cards
GB191104050A
(en )
1912-02-19
Improvements in and relating to Apparatus for Perforating the Signal Controlling Tape to be used with Automatic Telegraph Transmitters.
GB228184A
(enExample )
GB416498A
(enExample )
US1285149A
(en )
1918-11-19
Adding-machine.
GB334727A
(enExample )
US683725A
(en )
1901-10-01
Cash-register.
GB601099A
(en )
1948-04-27
Improvements in or relating to statistical machines
GB473624A
(enExample )
GB381769A
(enExample )
GB741039A
(en )
1955-11-23
Calculating machine
GB143462A
(enExample )
GB338990A
(enExample )
GB199422A
(en )
1923-06-20
Improvements in machines for verifying or punching the holes in statistical record cards
GB459812A
(enExample )
GB469028A
(enExample )