FR655685A - Improvements to electrical signaling systems - Google Patents

Improvements to electrical signaling systems

Info

Publication number
FR655685A
FR655685A FR655685DA FR655685A FR 655685 A FR655685 A FR 655685A FR 655685D A FR655685D A FR 655685DA FR 655685 A FR655685 A FR 655685A
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 FR655685A publication Critical patent/FR655685A/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)
  • Mobile Radio Communication Systems (AREA)
  • Selective Calling Equipment (AREA)
FR655685D 1927-08-05 1928-06-13 Improvements to electrical signaling systems Expired FR655685A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20671/27A GB299915A (en) 1927-08-05 1927-08-05 Improvements in secret signalling systems

Publications (1)

Publication Number Publication Date
FR655685A true FR655685A (en) 1929-04-23

Family

ID=10149730

Family Applications (1)

Application Number Title Priority Date Filing Date
FR655685D Expired FR655685A (en) 1927-08-05 1928-06-13 Improvements to electrical signaling systems

Country Status (6)

Country Link
US (1) US1725032A (en)
BE (1) BE351858A (en)
DE (1) DE540782C (en)
FR (1) FR655685A (en)
GB (1) GB299915A (en)
NL (1) NL24066C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2132205A (en) * 1937-06-23 1938-10-04 Bell Telephone Labor Inc Secret transmission
DE3482363D1 (en) * 1983-09-30 1990-06-28 Nippon Telegraph & Telephone RADIO TRANSMITTER SYSTEM FOR A PHASE-MODULATED SIGNAL.

Also Published As

Publication number Publication date
DE540782C (en) 1932-01-07
GB299915A (en) 1928-11-05
US1725032A (en) 1929-08-20
BE351858A (en)
NL24066C (en)

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