GB146792A
(enrdf_load_stackoverflow )
GB479234A
(enrdf_load_stackoverflow )
1900-01-01
US3076597A
(en )
1963-02-05
Gelling
US2992773A
(en )
1961-07-18
Multiplication mechanism for adding machines
US1773026A
(en )
1930-08-12
For calculators
US2063740A
(en )
1936-12-08
Calculating machine
GB191105283A
(en )
1911-11-30
Improvements in Calculating Machines.
GB169983A
(enrdf_load_stackoverflow )
US2414027A
(en )
1947-01-07
Partial
GB440180A
(enrdf_load_stackoverflow )
GB1048619A
(enrdf_load_stackoverflow )
GB469028A
(enrdf_load_stackoverflow )
GB709181A
(enrdf_load_stackoverflow )
GB190815095A
(en )
1909-07-16
Improvements in or relating to Calculating Machines, Cash Registers & the like.
GB736097A
(enrdf_load_stackoverflow )
GB240889A
(enrdf_load_stackoverflow )
GB699954A
(en )
1953-11-18
Improvements in computing machines
GB219923A
(enrdf_load_stackoverflow )
GB757113A
(enrdf_load_stackoverflow )
GB191421089A
(en )
1915-09-30
Improvements in or relating to Calculating Machines.
GB313513A
(enrdf_load_stackoverflow )
GB430745A
(enrdf_load_stackoverflow )
GB675363A
(enrdf_load_stackoverflow )
GB191119694A
(en )
1912-09-04
Adding and Computing Machine.
GB228184A
(enrdf_load_stackoverflow )