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FR662305A - Improvements to corded or wireless telephone systems - Google Patents

Improvements to corded or wireless telephone systems

Info

Publication number
FR662305A
FR662305A FR662305DA FR662305A FR 662305 A FR662305 A FR 662305A FR 662305D A FR662305D A FR 662305DA FR 662305 A FR662305 A FR 662305A
Authority
FR
France
Prior art keywords
corded
wireless telephone
telephone systems
systems
wireless
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.)
Societe Francaise Radio Electrique
Original Assignee
Societe Francaise Radio Electrique
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 Societe Francaise Radio Electrique filed Critical Societe Francaise Radio Electrique
Application granted granted Critical
Publication of FR662305A publication Critical patent/FR662305A/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)
FR662305D 1928-02-09 1928-02-09 Improvements to corded or wireless telephone systems Expired FR662305A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR662305T 1928-02-09

Publications (1)

Publication Number Publication Date
FR662305A true FR662305A (en) 1929-08-06

Family

ID=9011436

Family Applications (1)

Application Number Title Priority Date Filing Date
FR662305D Expired FR662305A (en) 1928-02-09 1928-02-09 Improvements to corded or wireless telephone systems

Country Status (1)

Country Link
FR (1) FR662305A (en)

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