GB446754A
(enrdf_load_stackoverflow )
GB424132A
(en )
1935-02-15
Improvements in or relating to calculating machines, accounting machines and similar machines
US2383260A
(en )
1945-08-21
Typewriting machine
GB425691A
(en )
1935-03-20
Improvements in or relating to power operated typewriters
US2021618A
(en )
1935-11-19
Computing machine
US1787489A
(en )
1931-01-06
Carriage equipment for accounting machines
GB442771A
(en )
1936-02-12
Improvements in or relating to cash registers and similar accounting machines
GB360824A
(en )
1931-11-05
Improvements in printing mechanism for adding machines
US2008921A
(en )
1935-07-23
Calculating machine
CA1125219A
(en )
1982-06-08
Single element typewriter with error correction feature
US667649A
(en )
1901-02-05
Type-writer.
US1854748A
(en )
1932-04-19
Paper carriage escapement disabling mechanism
GB414377A
(enrdf_load_stackoverflow )
US2711855A
(en )
1955-06-28
Automatic non-tabulating mechanism for accounting machines
USRE23031E
(en )
1948-08-24
Calculating machine
US4412755A
(en )
1983-11-01
Typewriter with an erasing apparatus
GB213600A
(enrdf_load_stackoverflow )
1900-01-01
GB427108A
(enrdf_load_stackoverflow )
US1301986A
(en )
1919-04-29
Cipher-printing mechanism.
US682758A
(en )
1901-09-17
Type-writer escapement.
GB537735A
(enrdf_load_stackoverflow )
GB490524A
(enrdf_load_stackoverflow )
GB750051A
(en )
1956-06-06
Improvements in repeat operation mechanism for power driven typewriters or like machines
GB276357A
(enrdf_load_stackoverflow )
GB461347A
(enrdf_load_stackoverflow )