US2397745A
(en )
1946-04-02
Adding machine
GB497640A
(enExample )
US1992142A
(en )
1935-02-19
Calculating machine
GB427722A
(enExample )
GB420807A
(enExample )
1900-01-01
GB417991A
(enExample )
1900-01-01
GB285885A
(enExample )
GB474938A
(enExample )
GB516693A
(enExample )
US1744033A
(en )
1930-01-21
berger
GB348105A
(enExample )
GB508141A
(enExample )
US1819067A
(en )
1931-08-18
Overdraft and signal printing mechanism for calculating machines
GB423169A
(en )
1935-01-24
Improvements in or relating to calculating and the like machines
GB191346A
(en )
1923-01-04
Improvements in and relating to keyboard and differential mechanism for cash registers and like machines
GB215746A
(en )
1925-08-04
Improvements in cash registers and like machines
GB445877A
(en )
1936-04-20
Improvements in or relating to calculating or the like machines
GB442443A
(en )
1936-02-07
Improvements in or relating to calculating machines, accounting machines and similarmachines
GB747470A
(en )
1956-04-04
Cash registers
GB509042A
(enExample )
GB496720A
(enExample )
GB749504A
(enExample )
GB438369A
(enExample )
GB416498A
(enExample )
GB487494A
(enExample )