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ES121183A1 - Procedure for obtaining secret communication on the "Train Dispatching" telephone lines using the selective call system, western electric or similar system and, in general, all step-by-step selection systems. - Google Patents

Procedure for obtaining secret communication on the "Train Dispatching" telephone lines using the selective call system, western electric or similar system and, in general, all step-by-step selection systems.

Info

Publication number
ES121183A1
ES121183A1 ES121183A ES121183A ES121183A1 ES 121183 A1 ES121183 A1 ES 121183A1 ES 121183 A ES121183 A ES 121183A ES 121183 A ES121183 A ES 121183A ES 121183 A1 ES121183 A1 ES 121183A1
Authority
ES
Spain
Prior art keywords
procedure
general
telephone lines
selective call
secret communication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
ES121183A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to ES121183A priority Critical patent/ES121183A1/en
Publication of ES121183A1 publication Critical patent/ES121183A1/en
Expired legal-status Critical Current

Links

ES121183A 1930-12-31 1930-12-31 Procedure for obtaining secret communication on the "Train Dispatching" telephone lines using the selective call system, western electric or similar system and, in general, all step-by-step selection systems. Expired ES121183A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES121183A ES121183A1 (en) 1930-12-31 1930-12-31 Procedure for obtaining secret communication on the "Train Dispatching" telephone lines using the selective call system, western electric or similar system and, in general, all step-by-step selection systems.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES121183A ES121183A1 (en) 1930-12-31 1930-12-31 Procedure for obtaining secret communication on the "Train Dispatching" telephone lines using the selective call system, western electric or similar system and, in general, all step-by-step selection systems.

Publications (1)

Publication Number Publication Date
ES121183A1 true ES121183A1 (en) 1931-01-16

Family

ID=65566863

Family Applications (1)

Application Number Title Priority Date Filing Date
ES121183A Expired ES121183A1 (en) 1930-12-31 1930-12-31 Procedure for obtaining secret communication on the "Train Dispatching" telephone lines using the selective call system, western electric or similar system and, in general, all step-by-step selection systems.

Country Status (1)

Country Link
ES (1) ES121183A1 (en)

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