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US3267220A
(en)
|
|
Magnetic drum translator
|
|
GB846722A
(en)
|
|
Improvements in character sensing apparatus
|
|
DE1938142A1
(de)
|
|
Automatisches Nachrichtenuebertragungssystem
|
|
DE1437502A1
(de)
|
|
Vermittlungssystem fuer Fernmeldeanlagen
|
|
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(en)
|
|
Telephone switching network
|
|
SE177393C1
(https=)
|
|
|
|
US3048827A
(en)
|
|
Intelligence storage equipment with independent recording and reading facilities
|
|
US2896848A
(en)
|
|
Magnetic core shift register counter
|
|
US2902678A
(en)
|
|
Magnetic switching systems
|
|
GB890182A
(en)
|
|
Improvements in or relating to binary information storage and transfer systems
|
|
US3548379A
(en)
|
|
Electrical control system array responsive to plural pulse trains
|
|
US2504621A
(en)
|
|
Enciphering and deciphering device for secret telegraph systems
|
|
US2552719A
(en)
|
|
Automatic registering device for impulse series
|
|
US3169169A
(en)
|
|
Traffic observation system
|
|
US2897281A
(en)
|
|
Automatic telephone systems and the like
|
|
US3156772A
(en)
|
|
Telephone message unit recording system
|
|
US3066191A
(en)
|
|
Automatic telecommunication exchange
|
|
SE175017C1
(https=)
|
|
|
|
US1395977A
(en)
|
|
Telephone-exchange system
|
|
SE187350C1
(https=)
|
|
|
|
SE176803C1
(https=)
|
|
|
|
US2704785A
(en)
|
|
Automatic telephone-exchange systems
|
|
US1672970A
(en)
|
|
Machine switching telephone system
|
|
SE177085C1
(https=)
|
|
|
|
US2810018A
(en)
|
|
Automatic telephone systems
|