GB166486A
(enrdf_load_stackoverflow )
US2121683A
(en )
1938-06-21
Calculating machine
US2087182A
(en )
1937-07-13
Listing adding machine
US1949445A
(en )
1934-03-06
Adding machine
GB479234A
(enrdf_load_stackoverflow )
1900-01-01
GB518840A
(enrdf_load_stackoverflow )
US3040977A
(en )
1962-06-26
Function control mechanism for manual adding machines
US2588127A
(en )
1952-03-04
Interlock foe calculating machine
US1858290A
(en )
1932-05-17
Joooooooooooo
US3350006A
(en )
1967-10-31
Calculating machine
GB753841A
(enrdf_load_stackoverflow )
GB191421089A
(en )
1915-09-30
Improvements in or relating to Calculating Machines.
GB686541A
(enrdf_load_stackoverflow )
US1773025A
(en )
1930-08-12
chase
GB191327655A
(en )
1915-01-01
Improvements in and relating to Methods of Calculating & Calculating Apparatus.
USRE17466E
(en )
1929-10-22
chase
GB601375A
(enrdf_load_stackoverflow )
GB787507A
(enrdf_load_stackoverflow )
GB925622A
(enrdf_load_stackoverflow )
GB608989A
(en )
1948-09-23
Improvements in calculating machines
GB368311A
(enrdf_load_stackoverflow )
GB205870A
(en )
1923-10-24
Improvements in or relating to calculating machines
GB607744A
(enrdf_load_stackoverflow )
GB191105283A
(en )
1911-11-30
Improvements in Calculating Machines.
GB430745A
(enrdf_load_stackoverflow )