GB732239A
(https= )
GB676195A
(en )
1952-07-23
Improvements in and relating to typing and justifying machines
US2577395A
(en )
1951-12-04
Autographic eegister
US2570931A
(en )
1951-10-09
Printing tabulating mechanism
US2364769A
(en )
1944-12-12
Accounting machine
US2107142A
(en )
1938-02-01
Listing adding machine
US3072325A
(en )
1963-01-08
Kohler etai
US1630814A
(en )
1927-05-31
Cash register
US2809782A
(en )
1957-10-15
fleming
US3383036A
(en )
1968-05-14
Arrangement for positioning the decimal point in calculating machines
GB819283A
(https= )
GB539453A
(https= )
GB285885A
(https= )
GB900541A
(en )
1962-07-04
Document sorting and accounting systems and apparatus
GB753419A
(https= )
GB809523A
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1959-02-25
Ten key adding and subtracting machine
GB783869A
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US2710140A
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1955-06-07
anderson
GB660615A
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GB631379A
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GB749504A
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GB344393A
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GB629975A
(https= )
GB241213A
(https= )
GB191203390A
(en )
1913-02-06
Combined Typewriter and Computing Machine.