FR530101A - Telephone amplifier device - Google Patents

Telephone amplifier device

Info

Publication number
FR530101A
FR530101A FR530101DA FR530101A FR 530101 A FR530101 A FR 530101A FR 530101D A FR530101D A FR 530101DA FR 530101 A FR530101 A FR 530101A
Authority
FR
France
Prior art keywords
amplifier device
telephone amplifier
telephone
amplifier
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.)
CENTRALE D ENTPR S ETABLISSEME
Original Assignee
CENTRALE D ENTPR S ETABLISSEME
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 CENTRALE D ENTPR S ETABLISSEME filed Critical CENTRALE D ENTPR S ETABLISSEME
Application granted granted Critical
Publication of FR530101A publication Critical patent/FR530101A/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
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR530101D 1921-01-22 1921-01-22 Telephone amplifier device Expired FR530101A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR530101T 1921-01-22

Publications (1)

Publication Number Publication Date
FR530101A true FR530101A (en) 1921-12-16

Family

ID=8923078

Family Applications (1)

Application Number Title Priority Date Filing Date
FR530101D Expired FR530101A (en) 1921-01-22 1921-01-22 Telephone amplifier device

Country Status (1)

Country Link
FR (1) FR530101A (en)

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