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GB782223A
|
|
Improvements in and relating to ciphering machines
|
|
GB771533A
|
|
Switching device for ciphering apparatus
|
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GB741456A
|
|
A device for determining at random series of sign symbols such as numerals or letters for use in coding or ciphering
|
|
GB734654A
|
|
Improvements in sign or type wheels
|
|
GB722589A
|
|
Improvements in power-driven ciphering devices
|
|
GB742181A
|
|
Improvements in keying mechanism for cryptographic devices
|
|
GB671395A
|
|
Improvements in or relating to intermittent injection devices for liquids and to liquid supply systems therefor
|
|
GB418877A
|
|
Improvements in ciphering machines
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