GB484095A
(enExample )
GB479234A
(enExample )
1900-01-01
GB601375A
(enExample )
US3072329A
(en )
1963-01-08
Control for motor operated business machines
GB496720A
(enExample )
GB518837A
(enExample )
GB720088A
(enExample )
US2330270A
(en )
1943-09-28
Register
GB728773A
(enExample )
GB516693A
(enExample )
GB566376A
(enExample )
GB191210902A
(en )
1913-06-09
Combined Typewriting and Computing Machine.
GB508141A
(enExample )
GB925622A
(enExample )
GB712750A
(en )
1954-07-28
Improvements in or relating to calculating machines
US1396716A
(en )
1921-11-08
magnus
GB423169A
(en )
1935-01-24
Improvements in or relating to calculating and the like machines
GB395688A
(enExample )
GB205870A
(en )
1923-10-24
Improvements in or relating to calculating machines
GB418536A
(enExample )
GB903879A
(enExample )
GB672210A
(enExample )
GB753841A
(enExample )
GB644383A
(enExample )
GB732760A
(enExample )