FR784725A - Telephone device usable in the dark - Google Patents

Telephone device usable in the dark

Info

Publication number
FR784725A
FR784725A FR784725DA FR784725A FR 784725 A FR784725 A FR 784725A FR 784725D A FR784725D A FR 784725DA FR 784725 A FR784725 A FR 784725A
Authority
FR
France
Prior art keywords
dark
telephone device
device usable
usable
telephone
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
Sciilemenson
Kohan
Houssid
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 FR784725A publication Critical patent/FR784725A/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)
FR784725D 1935-01-28 1935-01-28 Telephone device usable in the dark Expired FR784725A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR784725T 1935-01-28

Publications (1)

Publication Number Publication Date
FR784725A true FR784725A (en) 1935-07-23

Family

ID=9217441

Family Applications (1)

Application Number Title Priority Date Filing Date
FR784725D Expired FR784725A (en) 1935-01-28 1935-01-28 Telephone device usable in the dark

Country Status (1)

Country Link
FR (1) FR784725A (en)

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