GB146792A
(enExample )
GB479234A
(enExample )
1900-01-01
US2992773A
(en )
1961-07-18
Multiplication mechanism for adding machines
US2063740A
(en )
1936-12-08
Calculating machine
GB191105283A
(en )
1911-11-30
Improvements in Calculating Machines.
GB169983A
(enExample )
US2414027A
(en )
1947-01-07
Partial
GB440180A
(enExample )
GB1048619A
(enExample )
GB469028A
(enExample )
GB709181A
(enExample )
GB190815095A
(en )
1909-07-16
Improvements in or relating to Calculating Machines, Cash Registers & the like.
GB736097A
(enExample )
GB699954A
(en )
1953-11-18
Improvements in computing machines
GB219923A
(enExample )
GB757113A
(enExample )
GB191421089A
(en )
1915-09-30
Improvements in or relating to Calculating Machines.
GB430745A
(enExample )
GB675363A
(enExample )
GB191119694A
(en )
1912-09-04
Adding and Computing Machine.
GB228184A
(enExample )
GB438516A
(enExample )
GB191115908A
(en )
1912-07-04
Improvements in or relating to the Setting and Differential Actuating Mechanisms of Calculating-machines.
GB1063900A
(enExample )
GB435286A
(enExample )