GB373131A
(da )
GB1172819A
(en )
1969-12-03
Keyboard Mechanisms.
GB1082776A
(en )
1967-09-13
Keyboard mechanism for generating code combinations
GB373220A
(da )
US2593666A
(en )
1952-04-22
Key lock means for cash reg
US1215013A
(en )
1917-02-06
Tumbler-lock.
GB672771A
(da )
US3516604A
(en )
1970-06-23
Sequential keyboard interlock
GB1122887A
(en )
1968-08-07
A data entry machine
US601371A
(en )
1898-03-29
czeiler
GB191421089A
(en )
1915-09-30
Improvements in or relating to Calculating Machines.
US2161850A
(en )
1939-06-13
Locking means for levers
GB346842A
(da )
US2280958A
(en )
1942-04-28
Cash register
US2621508A
(en )
1952-12-16
Combination lock
GB228184A
(da )
GB509444A
(da )
GB381158A
(da )
US887673A
(en )
1908-05-12
Cash-register.
GB1154111A
(en )
1969-06-04
Encoder.
GB487494A
(da )
GB191511254A
(en )
1916-08-04
Improvements in Combined Typewriting and Computing Machines.
GB191027151A
(en )
1911-09-28
Improvements in Calculating Machines.
GB438369A
(da )
GB191219273A
(en )
1913-03-13
Improvements in the Keyboards and Connecting Members of Calculating Machines.