GB178084A
(enrdf_load_stackoverflow )
US1987742A
(en )
1935-01-15
Keyboard clutch
US2580298A
(en )
1951-12-25
Automatic stop for calculating machines
GB194315A
(enrdf_load_stackoverflow )
GB178417A
(enrdf_load_stackoverflow )
GB551311A
(enrdf_load_stackoverflow )
US2568616A
(en )
1951-09-18
Gourdon
US2554103A
(en )
1951-05-22
Clearing device in calculating
US3400799A
(en )
1968-09-10
High speed type action
GB203761A
(enrdf_load_stackoverflow )
GB394999A
(enrdf_load_stackoverflow )
US2731206A
(en )
1956-01-17
Calculating machine function control keys interlock
GB370633A
(enrdf_load_stackoverflow )
US3495771A
(en )
1970-02-17
Devices in adding machines having a multiplying mechanism for converting a total-taking operation into a subtotal-taking operation
US2954848A
(en )
1960-10-04
Thumim
GB416870A
(enrdf_load_stackoverflow )
US895523A
(en )
1908-08-11
Adding-tabulator.
US1238060A
(en )
1917-08-21
Combined type-writing and computing machine.
GB642090A
(en )
1950-08-30
Keyboard impulse transmitter for step-by-step printing telegraph
US2055623A
(en )
1936-09-29
Calculating machine
US596452A
(en )
1897-12-28
Emory a
GB449004A
(enrdf_load_stackoverflow )
GB190928064A
(en )
1910-12-01
Improvements in and relating to Cash Registers.
GB852822A
(enrdf_load_stackoverflow )
GB250612A
(enrdf_load_stackoverflow )