SE307141B
(enrdf_load_stackoverflow )
1968-12-23
US2424359A
(en )
1947-07-22
Adding machine
GB211622A
(enrdf_load_stackoverflow )
US2087182A
(en )
1937-07-13
Listing adding machine
US2070785A
(en )
1937-02-16
Register
GB909935A
(en )
1962-11-07
Calculating or similar accounting machine
US3072329A
(en )
1963-01-08
Control for motor operated business machines
US2714988A
(en )
1955-08-09
Keyboard controls for adding machines
GB487494A
(enrdf_load_stackoverflow )
GB693659A
(enrdf_load_stackoverflow )
US2809782A
(en )
1957-10-15
fleming
GB363470A
(enrdf_load_stackoverflow )
US3019967A
(en )
1962-02-06
mathews
GB394999A
(enrdf_load_stackoverflow )
GB709181A
(enrdf_load_stackoverflow )
GB518840A
(enrdf_load_stackoverflow )
GB445540A
(enrdf_load_stackoverflow )
US2994474A
(en )
1961-08-01
fleming
GB191417946A
(en )
1915-04-06
Improvements in Adding Machines.
GB191309102A
(en )
1914-05-18
Improvements in or relating to Adding, Listing and like Machines.
GB749504A
(enrdf_load_stackoverflow )
GB416870A
(enrdf_load_stackoverflow )
GB608989A
(en )
1948-09-23
Improvements in calculating machines
GB808192A
(enrdf_load_stackoverflow )
GB693657A
(en )
1953-07-01
Calculating machines