GB250258A
(en )
1927-07-01
Improvements in or relating to means for producing punched records for use in calculating apparatus
GB273130A
(enrdf_load_stackoverflow )
US2226960A
(en )
1940-12-31
Accounting machine
US2087182A
(en )
1937-07-13
Listing adding machine
US3009634A
(en )
1961-11-21
Allward
US2265626A
(en )
1941-12-09
Calculating machine
US1947512A
(en )
1934-02-20
Automatic signal for adding machines
US3281069A
(en )
1966-10-25
Credit balance transfer mechanism for ten-key
adding and subtracting machine
US3084855A
(en )
1963-04-09
Ten-key adding machine fo r non-uniform
US3072329A
(en )
1963-01-08
Control for motor operated business machines
US1909714A
(en )
1933-05-16
Automatic calculator
US2063740A
(en )
1936-12-08
Calculating machine
US3008637A
(en )
1961-11-14
Complemental keyboard
GB479234A
(enrdf_load_stackoverflow )
1900-01-01
US2074026A
(en )
1937-03-16
Calculating machine
US1682196A
(en )
1928-08-28
Cash register
US1994539A
(en )
1935-03-19
Cash register
US2770187A
(en )
1956-11-13
Check writing accounting machine
US3474957A
(en )
1969-10-28
Actuating mechanism for result key in calculator having multiplication facility
US1681567A
(en )
1928-08-21
barrett
GB237522A
(enrdf_load_stackoverflow )
US2698138A
(en )
1954-12-28
Special counter mechanism
GB224244A
(en )
1925-03-27
Improvements in keyboard and differential mechanism for cash registers or calculating machines
US3003686A
(en )
1961-10-10
Clear sign printing means for an accounting machine having true negative totalization
GB228184A
(enrdf_load_stackoverflow )