US3882990A
(en )
1975-05-13
Error correction system for typewriters or printing devices
US2398457A
(en )
1946-04-16
Typewriting machine
US2872015A
(en )
1959-02-03
Stepwise carriage positioning mechanism and related features
GB379727A
(enrdf_load_stackoverflow )
US2165223A
(en )
1939-07-11
Power-operated typewriter
US2816609A
(en )
1957-12-17
Tape perforating machine
US2325505A
(en )
1943-07-27
Justifying mechanism for typewriters and the like
US2183920A
(en )
1939-12-19
Combined typewriting and account
GB703270A
(en )
1954-02-03
Improvements in or relating to printing apparatus for statistical machines
US2506701A
(en )
1950-05-09
Keyboard operated printing machine
US1975808A
(en )
1934-10-09
Computing and printing machine
US1983698A
(en )
1934-12-11
H kaufmann
US2178037A
(en )
1939-10-31
Mechanism for the advancement of the carriage of typewriters and the like
US2165224A
(en )
1939-07-11
Typewriting machine
US2107397A
(en )
1938-02-08
Typewriting machine
US2156975A
(en )
1939-05-02
Typewriting machine
US2827145A
(en )
1958-03-18
Paper feeding means for an accounting machine
US1558198A
(en )
1925-10-20
Apparatus for bookkeeping
US780271A
(en )
1905-01-17
Combined tabulating and writing machine.
US2313418A
(en )
1943-03-09
Special character and amount printing mechanism
US1123337A
(en )
1915-01-05
Adding and listing machine.
US3939767A
(en )
1976-02-24
Apparatus for imprinting selected characters on a movable record medium
US661097A
(en )
1900-11-06
Type-writing machine for writing music.
US1487300A
(en )
1924-03-18
Typewriter
US441880A
(en )
1890-12-02
Type-writing machine