GB770319A
(enrdf_load_stackoverflow )
US1957501A
(en )
1934-05-08
Method and means for obtaining true
US2087182A
(en )
1937-07-13
Listing adding machine
US2710139A
(en )
1955-06-07
Swanson
US2447108A
(en )
1948-08-17
T avery
US2070785A
(en )
1937-02-16
Register
US2731197A
(en )
1956-01-17
Pin box control mechanism
US1915296A
(en )
1933-06-27
crosman
GB526762A
(en )
1940-09-25
Improvements in calculating machines
USRE17466E
(en )
1929-10-22
chase
US3072329A
(en )
1963-01-08
Control for motor operated business machines
GB172917A
(enrdf_load_stackoverflow )
US1829210A
(en )
1931-10-27
A corpobation of dela
US1935609A
(en )
1933-11-21
Total key unlocking means for adding machines
US2048842A
(en )
1936-07-28
Listing
GB675363A
(enrdf_load_stackoverflow )
GB699954A
(en )
1953-11-18
Improvements in computing machines
GB660615A
(enrdf_load_stackoverflow )
GB903879A
(enrdf_load_stackoverflow )
GB407030A
(en )
1934-03-06
Improvements in or relating to record card controlled tabulating machines
GB721535A
(enrdf_load_stackoverflow )
GB723864A
(enrdf_load_stackoverflow )
GB417991A
(enrdf_load_stackoverflow )
1900-01-01
GB317014A
(en )
1930-12-08
Improvements in or relating to calculating or accounting machines
GB686524A
(enrdf_load_stackoverflow )