FR1183332A - Telephone amplifier - Google Patents

Telephone amplifier

Info

Publication number
FR1183332A
FR1183332A FR1183332DA FR1183332A FR 1183332 A FR1183332 A FR 1183332A FR 1183332D A FR1183332D A FR 1183332DA FR 1183332 A FR1183332 A FR 1183332A
Authority
FR
France
Prior art keywords
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)
Inventor
Edgard Amsellem
Sylvain Amsellem
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 FR1183332A publication Critical patent/FR1183332A/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
    • H04M1/21—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads
    • H04M1/215—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads by non-intrusive coupling means, e.g. acoustic couplers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR1183332D 1957-09-25 1957-09-25 Telephone amplifier Expired FR1183332A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1183332T 1957-09-25

Publications (1)

Publication Number Publication Date
FR1183332A true FR1183332A (en) 1959-07-06

Family

ID=9662938

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1183332D Expired FR1183332A (en) 1957-09-25 1957-09-25 Telephone amplifier

Country Status (1)

Country Link
FR (1) FR1183332A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3217254A (en) * 1962-11-26 1965-11-09 Robert M Hughes Switching system for radio-telephone system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3217254A (en) * 1962-11-26 1965-11-09 Robert M Hughes Switching system for radio-telephone system

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