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FR818988A - Lighting mode for the automatic system telephone device - Google Patents

Lighting mode for the automatic system telephone device

Info

Publication number
FR818988A
FR818988A FR818988DA FR818988A FR 818988 A FR818988 A FR 818988A FR 818988D A FR818988D A FR 818988DA FR 818988 A FR818988 A FR 818988A
Authority
FR
France
Prior art keywords
telephone device
lighting mode
automatic system
system telephone
automatic
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)
Inventor
Silberstein Isidor
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 filed Critical
Application granted granted Critical
Publication of FR818988A publication Critical patent/FR818988A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR818988D 1937-03-10 1937-03-10 Lighting mode for the automatic system telephone device Expired FR818988A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR818988T 1937-03-10

Publications (1)

Publication Number Publication Date
FR818988A true FR818988A (en) 1937-10-07

Family

ID=9269185

Family Applications (1)

Application Number Title Priority Date Filing Date
FR818988D Expired FR818988A (en) 1937-03-10 1937-03-10 Lighting mode for the automatic system telephone device

Country Status (1)

Country Link
FR (1) FR818988A (en)

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