FR652421A - Improvements to electrical signaling systems - Google Patents

Improvements to electrical signaling systems

Info

Publication number
FR652421A
FR652421A FR652421DA FR652421A FR 652421 A FR652421 A FR 652421A FR 652421D A FR652421D A FR 652421DA FR 652421 A FR652421 A FR 652421A
Authority
FR
France
Prior art keywords
signaling systems
electrical signaling
electrical
systems
signaling
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
Other languages
French (fr)
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR652421A publication Critical patent/FR652421A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/04—Secret communication by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
FR652421D 1928-04-10 1928-04-10 Improvements to electrical signaling systems Expired FR652421A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR652421T 1928-04-10

Publications (1)

Publication Number Publication Date
FR652421A true FR652421A (en) 1929-03-08

Family

ID=9005213

Family Applications (1)

Application Number Title Priority Date Filing Date
FR652421D Expired FR652421A (en) 1928-04-10 1928-04-10 Improvements to electrical signaling systems

Country Status (1)

Country Link
FR (1) FR652421A (en)

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