GB1084690A
(https= )
GB632379A
(en )
1949-11-28
Improvements in or relating to keyboards, especially for electrically-controlled accounting or card-punching machines
GB693679A
(en )
1953-07-01
Calculating machines
US3489341A
(en )
1970-01-13
Automatic cycle control mechanism for business machines
GB608988A
(https= )
US2063740A
(en )
1936-12-08
Calculating machine
GB681036A
(https= )
US2991008A
(en )
1961-07-04
goldberg
GB228184A
(https= )
GB413304A
(https= )
GB147763A
(https= )
GB600746A
(en )
1948-04-16
Improvements in or relating to calculating machines
GB206467A
(https= )
GB813083A
(en )
1959-05-06
Calculating machines or similar accounting machines
GB612392A
(en )
1948-11-11
Improvements in or relating to accounting machines and similar calculating machines
GB453505A
(en )
1936-09-14
Improvements in or relating to totalizer control mechanism for calculating machines, accounting machines or similar machines
GB497462A
(https= )
GB200585A
(https= )
GB420431A
(https= )
GB508141A
(https= )
GB191109167A
(en )
1911-08-09
Improvements in or relating to the Key Board or Setting Mechanism of Cash Registers and the like.
GB537502A
(https= )
GB191213037A
(en )
1912-11-22
Improvements in and relating to Adding and Transaction-counting Mechanism for Cash Registers, or Computing or Registering Machines.
GB190417525A
(en )
1905-06-01
Improvements relating to the Key Action of Cash Registers.
GB346093A
(https= )