GB508954A
(en )
1939-07-05
Improvements in machines for operating upon statistical cards
GB180970A
(https= )
US3516604A
(en )
1970-06-23
Sequential keyboard interlock
US1741201A
(en )
1929-12-31
Accounting machine
GB344393A
(https= )
GB487494A
(https= )
US3064892A
(en )
1962-11-20
Mvscozzafxva
GB394999A
(https= )
GB854504A
(en )
1960-11-23
Improvements in power-actuated typewriting calculating machines with tape-punch attachment
US1840535A
(en )
1932-01-12
shipley
US1601398A
(en )
1926-09-28
- cincinnati
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
(https= )
GB459018A
(https= )
GB416498A
(https= )
US1285149A
(en )
1918-11-19
Adding-machine.
GB334727A
(https= )
US683725A
(en )
1901-10-01
Cash-register.
US523611A
(en )
1894-07-24
Machine
GB473624A
(https= )
GB381769A
(https= )
GB741039A
(en )
1955-11-23
Calculating machine
GB143462A
(https= )
GB338990A
(https= )
GB199422A
(en )
1923-06-20
Improvements in machines for verifying or punching the holes in statistical record cards