GB550978A
(en )
1943-02-03
Improvements in or relating to calculating or similar accounting machines
US2424359A
(en )
1947-07-22
Adding machine
US2416809A
(en )
1947-03-04
Selective normalizing mechanisms
US2708550A
(en )
1955-05-17
Value setting and transmitting mechanism for a ten key machine
GB509747A
(enExample )
GB551311A
(enExample )
US2261341A
(en )
1941-11-04
Adding and listing machine
US1964975A
(en )
1934-07-03
Calculating machine
GB748825A
(en )
1956-05-09
Improvements in or relating to tabulator mechanism of a typewriter or like machine
GB545438A
(enExample )
GB650357A
(en )
1951-02-21
Differential setting mechanism for cash registers or similar accounting machines
GB166486A
(enExample )
US1970096A
(en )
1934-08-14
Calculating machine
GB631379A
(enExample )
US1965192A
(en )
1934-07-03
Cash register
US2055623A
(en )
1936-09-29
Calculating machine
US2127102A
(en )
1938-08-16
Reversing mechanism
GB406152A
(enExample )
1900-01-01
GB434369A
(enExample )
GB413205A
(enExample )
1900-01-01
GB518840A
(enExample )
GB318256A
(enExample )
GB438369A
(enExample )
GB260179A
(enExample )
GB764126A
(enExample )