US2221861A
(en )
1940-11-19
Calculating machine
GB483093A
(enrdf_load_stackoverflow )
US2261341A
(en )
1941-11-04
Adding and listing machine
US1915296A
(en )
1933-06-27
crosman
US2701685A
(en )
1955-02-08
Calculating mechanism
US2994474A
(en )
1961-08-01
fleming
GB420807A
(enrdf_load_stackoverflow )
1900-01-01
US3039680A
(en )
1962-06-19
Cash registers
GB438369A
(enrdf_load_stackoverflow )
GB417991A
(enrdf_load_stackoverflow )
1900-01-01
GB672804A
(enrdf_load_stackoverflow )
GB190828253A
(en )
1909-12-28
Improvements in and relating to Mechanical Calculators.
GB732760A
(enrdf_load_stackoverflow )
GB516693A
(enrdf_load_stackoverflow )
GB509042A
(enrdf_load_stackoverflow )
GB368779A
(en )
1932-03-07
Improvements relating to cash registers
GB497640A
(enrdf_load_stackoverflow )
GB838815A
(enrdf_load_stackoverflow )
GB737050A
(en )
1955-09-21
Computing machine
GB477035A
(enrdf_load_stackoverflow )
GB608694A
(enrdf_load_stackoverflow )
GB475185A
(enrdf_load_stackoverflow )
GB371412A
(enrdf_load_stackoverflow )
GB903879A
(enrdf_load_stackoverflow )
GB165846A
(en )
1921-07-11
Improvements in and relating to total taking machines for compiling statistics from perforated record cards