US3382963A
(en )
1968-05-14
Printing apparatus with no-print feature
US3151722A
(en )
1964-10-06
Spring actuated typewriter action with fault sensing means
GB776270A
(enrdf_load_stackoverflow )
US2226960A
(en )
1940-12-31
Accounting machine
GB688289A
(en )
1953-03-04
Power operated typewriter
GB498395A
(en )
1939-01-06
Improvements in or relating to record-card-controlled printing mechanism
GB676195A
(en )
1952-07-23
Improvements in and relating to typing and justifying machines
US2528450A
(en )
1950-10-31
Power regulating means for typewriters
US2139719A
(en )
1938-12-13
Cash register
US2383260A
(en )
1945-08-21
Typewriting machine
US2453287A
(en )
1948-11-09
Power operating mechanism for typewriting machines
US2862593A
(en )
1958-12-02
Denominational tabulating mechanism
US2285311A
(en )
1942-06-02
Accounting machine
GB1064940A
(en )
1967-04-12
Zero printing control device for a calculating machine
GB806433A
(en )
1958-12-23
Improvements in or relating to telegraph type-printing apparatus
US1927878A
(en )
1933-09-26
Calculating machine
GB673238A
(en )
1952-06-04
Improvements in or relating to printing mechanisms
GB823136A
(en )
1959-11-04
Proportional letter feed mechanism
GB546713A
(enrdf_load_stackoverflow )
US3006540A
(en )
1961-10-31
Program control device for accounting machines
US3260452A
(en )
1966-07-12
Apparatus for reducing the number of dividing movements of a calculator
GB537735A
(enrdf_load_stackoverflow )
USRE23031E
(en )
1948-08-24
Calculating machine
GB699954A
(en )
1953-11-18
Improvements in computing machines
GB521300A
(enrdf_load_stackoverflow )