GB178417A
(https= )
US1987742A
(en )
1935-01-15
Keyboard clutch
US2121683A
(en )
1938-06-21
Calculating machine
US2568616A
(en )
1951-09-18
Gourdon
US2305780A
(en )
1942-12-22
Calculating machine
US2919781A
(en )
1960-01-05
Control mechanism for the motor of an electric typewriter
US3000486A
(en )
1961-09-19
Ciphering machine
GB178084A
(https= )
US2666573A
(en )
1954-01-19
Differential latch mechanism
US2902124A
(en )
1959-09-01
Operating mechanism for power driven business machines
GB909935A
(en )
1962-11-07
Calculating or similar accounting machine
US1944994A
(en )
1934-01-30
Clutching device
GB194315A
(https= )
US1915624A
(en )
1933-06-27
shipley
US3612831A
(en )
1971-10-12
Function key mechanism in calculating machine or the like
US2319325A
(en )
1943-05-18
Cash register
US1238060A
(en )
1917-08-21
Combined type-writing and computing machine.
GB551311A
(https= )
US596452A
(en )
1897-12-28
Emory a
GB183867A
(en )
1922-07-26
Improvements relating to apparatus for compiling and printing statistics from perforated record cards
GB370633A
(https= )
USRE21829E
(en )
1941-06-17
Calculating machine
US748158A
(en )
1903-12-29
Attachment for calculating, printing, or analogous machines.
GB144361A
(en )
1920-06-07
Improvements in cash registers
GB191506359A
(en )
1916-04-27
Improvements in Locking Mechanism for Key Controlled Machines such as Cash Registers and the like.