GB986275A
(https= )
US3057550A
(en )
1962-10-09
Ten key calculating machine
US2666573A
(en )
1954-01-19
Differential latch mechanism
GB1064940A
(en )
1967-04-12
Zero printing control device for a calculating machine
GB1004384A
(en )
1965-09-15
Decimal system for calculating machines comprising an overcapacity control
US1539461A
(en )
1925-05-26
Gesellschaft
US3061186A
(en )
1962-10-30
Gelling
US3318520A
(en )
1967-05-09
Program control device for an adding or accounting machine
US3171594A
(en )
1965-03-02
And similar machines
US3040977A
(en )
1962-06-26
Function control mechanism for manual adding machines
GB982721A
(en )
1965-02-10
Adding machine
US2071880A
(en )
1937-02-23
Printing adding machine
US3682379A
(en )
1972-08-08
Tens transfer mechanism
US1818548A
(en )
1931-08-11
friden
US2940664A
(en )
1960-06-14
Ten-key setting mechanism
US3331556A
(en )
1967-07-18
Power driving device for a calculating machine
US2798672A
(en )
1957-07-09
Machine for calculating avoirdupois weights
US2347610A
(en )
1944-04-25
Calculating machine
US3297246A
(en )
1967-01-10
Adding machine for systems not having uniform
GB699954A
(en )
1953-11-18
Improvements in computing machines
GB737050A
(en )
1955-09-21
Computing machine
GB205870A
(en )
1923-10-24
Improvements in or relating to calculating machines
GB612392A
(en )
1948-11-11
Improvements in or relating to accounting machines and similar calculating machines
GB955536A
(https= )
GB1048619A
(https= )