US2399170A
(en )
1946-04-30
Calculating machine
US2339616A
(en )
1944-01-18
Calculating machine
GB368311A
(enrdf_load_stackoverflow )
US2360005A
(en )
1944-10-10
Key set gonteol mechanism for
US2087182A
(en )
1937-07-13
Listing adding machine
GB479234A
(enrdf_load_stackoverflow )
1900-01-01
US3069077A
(en )
1962-12-18
Rqsati
US2261341A
(en )
1941-11-04
Adding and listing machine
US3281069A
(en )
1966-10-25
Credit balance transfer mechanism for ten-key
adding and subtracting machine
US2588127A
(en )
1952-03-04
Interlock foe calculating machine
GB703886A
(enrdf_load_stackoverflow )
1900-01-01
US1034565A
(en )
1912-08-06
Adding, subtracting, and multiplying machine.
US2994474A
(en )
1961-08-01
fleming
GB401904A
(enrdf_load_stackoverflow )
GB686541A
(enrdf_load_stackoverflow )
GB671615A
(en )
1952-05-07
Improvements in or relating to accumulators for accounting machines
GB508141A
(enrdf_load_stackoverflow )
GB265208A
(en )
1927-06-30
Improvements in or relating to cash registers of the key-set and key-operated type
GB434369A
(enrdf_load_stackoverflow )
GB191512527A
(en )
1916-10-02
Improvements in or relating to Adding or like Machines.
GB612392A
(en )
1948-11-11
Improvements in or relating to accounting machines and similar calculating machines
GB420807A
(enrdf_load_stackoverflow )
1900-01-01
GB424420A
(enrdf_load_stackoverflow )
1900-01-01
GB753841A
(enrdf_load_stackoverflow )
GB598524A
(enrdf_load_stackoverflow )