GB140363A
(https= )
US2088434A
(en )
1937-07-27
Calculating machine
US2349660A
(en )
1944-05-23
Cash register
US2087182A
(en )
1937-07-13
Listing adding machine
US2570068A
(en )
1951-10-02
Keyboard interlock for calculating
US2063740A
(en )
1936-12-08
Calculating machine
US2074026A
(en )
1937-03-16
Calculating machine
US1294704A
(en )
1919-02-18
Elimination and special-signal mechanism.
US1991551A
(en )
1935-02-19
Cash register
GB741039A
(en )
1955-11-23
Calculating machine
US2469675A
(en )
1949-05-10
Decimal rounding off mechanism
US2027449A
(en )
1936-01-14
Calculating machine and cash
GB1122887A
(en )
1968-08-07
A data entry machine
GB191116725A
(en )
1912-07-18
Improvements in or relating to Cash Register Machines.
GB191019977A
(en )
1911-08-24
Improvements in and relating to Cash Registers.
GB208232A
(https= )
GB442771A
(en )
1936-02-12
Improvements in or relating to cash registers and similar accounting machines
GB457273A
(https= )
GB191009294A
(en )
1910-06-23
Improvements in and relating to Cash Registers.
GB459018A
(https= )
GB285500A
(en )
1929-05-21
Improvements in or relating to cash registers
GB465849A
(en )
1937-05-18
A nought-entering mechanism for "ten key" adding machines
GB191200798A
(en )
1913-02-10
Improvements in Cash Registers.
GB191120332A
(en )
1912-09-12
Improvements in and relating to Cash Registers.
GB469034A
(https= )