US2397745A
(en )
1946-04-02
Adding machine
US1867002A
(en )
1932-07-12
By edna b
GB435286A
(enrdf_load_stackoverflow )
US2087182A
(en )
1937-07-13
Listing adding machine
US2361707A
(en )
1944-10-31
A f pott
US3079073A
(en )
1963-02-26
Heinzeetal
US2139718A
(en )
1938-12-13
Cash register
GB479234A
(enrdf_load_stackoverflow )
1900-01-01
US2666573A
(en )
1954-01-19
Differential latch mechanism
GB1004384A
(en )
1965-09-15
Decimal system for calculating machines comprising an overcapacity control
US1773026A
(en )
1930-08-12
For calculators
GB650357A
(en )
1951-02-21
Differential setting mechanism for cash registers or similar accounting machines
US2994474A
(en )
1961-08-01
fleming
GB191030391A
(en )
1911-12-14
Improvements in Calculating Machines.
GB191021704A
(en )
1911-09-19
Improvements in Calculating Machines.
GB566376A
(enrdf_load_stackoverflow )
GB368117A
(enrdf_load_stackoverflow )
GB191309102A
(en )
1914-05-18
Improvements in or relating to Adding, Listing and like Machines.
GB293080A
(enrdf_load_stackoverflow )
GB363470A
(enrdf_load_stackoverflow )
GB703886A
(enrdf_load_stackoverflow )
1900-01-01
GB686524A
(enrdf_load_stackoverflow )
GB190518341A
(en )
1906-07-05
Combined Typewriting and Adding Machine.
GB191204178A
(en )
1912-08-21
Improvements in Calculating Machines.
GB481801A
(en )
1938-03-14
Improvements in and relating to adding machines having multiple-zero keys