US2221861A
(en )
1940-11-19
Calculating machine
US2399170A
(en )
1946-04-30
Calculating machine
GB700946A
(enrdf_load_stackoverflow )
US2087182A
(en )
1937-07-13
Listing adding machine
US1415174A
(en )
1922-05-09
horton
US2666573A
(en )
1954-01-19
Differential latch mechanism
US3008637A
(en )
1961-11-14
Complemental keyboard
US3007633A
(en )
1961-11-07
Total taking mechanism for crawl-carry accumulators
GB191119694A
(en )
1912-09-04
Adding and Computing Machine.
GB477035A
(enrdf_load_stackoverflow )
US3072329A
(en )
1963-01-08
Control for motor operated business machines
US1396716A
(en )
1921-11-08
magnus
GB701905A
(enrdf_load_stackoverflow )
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(en )
1961-08-01
fleming
GB693659A
(enrdf_load_stackoverflow )
GB703886A
(enrdf_load_stackoverflow )
1900-01-01
GB728773A
(enrdf_load_stackoverflow )
GB713484A
(enrdf_load_stackoverflow )
GB654387A
(enrdf_load_stackoverflow )
GB293080A
(enrdf_load_stackoverflow )
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(en )
1967-07-18
Power driving device for a calculating machine
GB469034A
(enrdf_load_stackoverflow )
GB606629A
(enrdf_load_stackoverflow )
GB423169A
(en )
1935-01-24
Improvements in or relating to calculating and the like machines
GB417991A
(enrdf_load_stackoverflow )
1900-01-01