US3623426A
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1971-11-30
Print control means in traveling roller bed and cylinder print machines
US2593666A
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1952-04-22
Key lock means for cash reg
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1927-12-06
Calculating machine
GB1122887A
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1968-08-07
A data entry machine
GB518840A
(enExample )
GB497640A
(enExample )
GB438369A
(enExample )
GB344393A
(enExample )
GB373220A
(enExample )
GB783869A
(enExample )
GB686524A
(enExample )
GB191511254A
(en )
1916-08-04
Improvements in Combined Typewriting and Computing Machines.
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(en )
1909-12-09
Improvements in Apparatus for Adding or Calculating.
GB190120133A
(en )
1902-10-08
Improvements in Adding Machines.
GB190722221A
(en )
1908-10-08
Improvements in Accounting Machines applicable more particularly to Cash and Credit Registers
GB608989A
(en )
1948-09-23
Improvements in calculating machines
GB567290A
(enExample )
GB506013A
(enExample )
GB285885A
(enExample )
GB484881A
(enExample )
GB633957A
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GB727100A
(enExample )
GB675363A
(enExample )
GB392181A
(enExample )
GB190218853A
(en )
1903-05-28
Improvements in Calculating Machines.