US2399170A
(en )
1946-04-30
Calculating machine
US2325388A
(en )
1943-07-27
Calculating machine
GB1063900A
(enrdf_load_stackoverflow )
US2992773A
(en )
1961-07-18
Multiplication mechanism for adding machines
US3286919A
(en )
1966-11-22
Calculating machine, especially pour-species
calculating machine
US3079073A
(en )
1963-02-26
Heinzeetal
US2352376A
(en )
1944-06-27
Calculating machine
US2447108A
(en )
1948-08-17
T avery
US3015436A
(en )
1962-01-02
Division mechanism for listing calculator
US3370788A
(en )
1968-02-27
Program control device for a calculating or like machine
US2650761A
(en )
1953-09-01
Calculating machine
GB191218642A
(en )
1913-08-14
Improvements in or relating to Calculating Machines.
US3423018A
(en )
1969-01-21
Ten key calculating machine adapted to effect multiplications as well as divisions
GB1048619A
(enrdf_load_stackoverflow )
US3143289A
(en )
1964-08-04
Langenberger
US3040977A
(en )
1962-06-26
Function control mechanism for manual adding machines
GB787507A
(enrdf_load_stackoverflow )
US3432094A
(en )
1969-03-11
Four-species calculating machine
US3331556A
(en )
1967-07-18
Power driving device for a calculating machine
GB686524A
(enrdf_load_stackoverflow )
GB765291A
(enrdf_load_stackoverflow )
GB718412A
(enrdf_load_stackoverflow )
GB767946A
(en )
1957-02-13
Improvements in or relating to operation control devices
GB686541A
(enrdf_load_stackoverflow )
GB438516A
(enrdf_load_stackoverflow )