FR658403A - Improvements to electrical signaling systems - Google Patents

Improvements to electrical signaling systems

Info

Publication number
FR658403A
FR658403A FR658403DA FR658403A FR 658403 A FR658403 A FR 658403A FR 658403D A FR658403D A FR 658403DA FR 658403 A FR658403 A FR 658403A
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 FR658403A publication Critical patent/FR658403A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/40—Applications of speech amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR658403D 1928-07-30 1928-07-30 Improvements to electrical signaling systems Expired FR658403A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR658403T 1928-07-30

Publications (1)

Publication Number Publication Date
FR658403A true FR658403A (en) 1929-06-04

Family

ID=9009075

Family Applications (1)

Application Number Title Priority Date Filing Date
FR658403D Expired FR658403A (en) 1928-07-30 1928-07-30 Improvements to electrical signaling systems

Country Status (1)

Country Link
FR (1) FR658403A (en)

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