US2424359A
(en )
1947-07-22
Adding machine
GB373220A
(https= )
GB1082776A
(en )
1967-09-13
Keyboard mechanism for generating code combinations
GB373131A
(https= )
US2593666A
(en )
1952-04-22
Key lock means for cash reg
GB191511254A
(en )
1916-08-04
Improvements in Combined Typewriting and Computing Machines.
GB191512527A
(en )
1916-10-02
Improvements in or relating to Adding or like Machines.
US1927856A
(en )
1933-09-26
Calculating machine
GB346842A
(https= )
US909867A
(en )
1909-01-19
Keyboard mechanism for registering-machines.
GB191421089A
(en )
1915-09-30
Improvements in or relating to Calculating Machines.
GB509444A
(https= )
GB190820028A
(en )
1909-09-23
Improvements in or relating to Adding Machines.
GB420807A
(https= )
1900-01-01
GB191027151A
(en )
1911-09-28
Improvements in Calculating Machines.
GB190327803A
(en )
1904-09-22
Improvements in Cash Registers.
GB381158A
(https= )
GB600446A
(https= )
GB545785A
(https= )
GB190515755A
(en )
1906-08-01
Improvements relating to Cash Registers.
GB408633A
(https= )
GB320104A
(https= )
GB401904A
(https= )
GB417991A
(https= )
1900-01-01
GB453280A
(https= )