GB550978A
(en )
1943-02-03
Improvements in or relating to calculating or similar accounting machines
GB394999A
(enrdf_load_stackoverflow )
US2121683A
(en )
1938-06-21
Calculating machine
US2985364A
(en )
1961-05-23
Calculating machines adapted for tape recording
US2087182A
(en )
1937-07-13
Listing adding machine
GB349512A
(en )
1931-05-26
Improvements in or relating to punching machines for perforating, and adding the amounts so recorded on, statistical record-cards
US2055623A
(en )
1936-09-29
Calculating machine
GB741039A
(en )
1955-11-23
Calculating machine
GB215746A
(en )
1925-08-04
Improvements in cash registers and like machines
GB416498A
(enrdf_load_stackoverflow )
US1646105A
(en )
1927-10-18
peters
US3685725A
(en )
1972-08-22
Controlling mechanism for calculating machine
US899965A
(en )
1908-09-29
Adding-machine.
GB709181A
(enrdf_load_stackoverflow )
GB295632A
(enrdf_load_stackoverflow )
GB344393A
(enrdf_load_stackoverflow )
GB386331A
(enrdf_load_stackoverflow )
GB194315A
(enrdf_load_stackoverflow )
GB190929891A
(en )
1910-03-29
Improvements in and relating to Mechanical Calculators.
GB348105A
(enrdf_load_stackoverflow )
GB191403083A
(en )
1915-02-05
Improvements in Adding Machines.
GB813083A
(en )
1959-05-06
Calculating machines or similar accounting machines
GB190902119A
(en )
1909-09-30
Improvements in or relating to Adding Machines.
GB191219273A
(en )
1913-03-13
Improvements in the Keyboards and Connecting Members of Calculating Machines.
GB852822A
(enrdf_load_stackoverflow )