GB452787A
(enExample )
US3703987A
(en )
1972-11-28
Keyboard locking device
US1630814A
(en )
1927-05-31
Cash register
US2264582A
(en )
1941-12-02
Accounting machine
US3015434A
(en )
1962-01-02
Repeat cycling control mechanism for cash registers and accounting machines
GB191305530A
(en )
1914-03-05
Device for Preventing the Depression of More than One Key of the same Group in Cash Registers and like Machines.
US1601398A
(en )
1926-09-28
- cincinnati
GB430251A
(en )
1935-06-17
Improvements in or relating to machines for verifying perforated record cards
US2809782A
(en )
1957-10-15
fleming
GB317057A
(en )
1930-10-30
Improvements in or relating to calculating or the like machines
US1952983A
(en )
1934-03-27
Typewriting machine
GB555659A
(en )
1943-09-01
Improvements in or relating to calculating or like machines
GB693657A
(en )
1953-07-01
Calculating machines
GB301920A
(enExample )
1930-03-07
GB749504A
(enExample )
GB191417946A
(en )
1915-04-06
Improvements in Adding Machines.
GB497640A
(enExample )
GB146273A
(en )
1921-10-24
Improvements in and relating to keyboard setting mechanism for adding-machines
GB144685A
(en )
1921-04-07
Improvements in printing mechanism for calculating machines
GB807392A
(en )
1959-01-14
Improvements in type action and case shift for typewriters
GB368254A
(en )
1932-03-01
Improvements in or relating to calculating machines and the like
GB768516A
(enExample )
GB228184A
(enExample )
GB408795A
(en )
1934-04-19
Improvements in or relating to calculating and/or check writing machines
GB191421089A
(en )
1915-09-30
Improvements in or relating to Calculating Machines.