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FR843838A - Speakerphone and device for this phone - Google Patents

Speakerphone and device for this phone

Info

Publication number
FR843838A
FR843838A FR843838DA FR843838A FR 843838 A FR843838 A FR 843838A FR 843838D A FR843838D A FR 843838DA FR 843838 A FR843838 A FR 843838A
Authority
FR
France
Prior art keywords
speakerphone
phone
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
Wladyslaw Niederlinski
Chaskiel Gottreich
Selig Gross
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 FR843838A publication Critical patent/FR843838A/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
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR843838D 1938-05-10 1938-09-23 Speakerphone and device for this phone Expired FR843838A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL843838X 1938-05-10

Publications (1)

Publication Number Publication Date
FR843838A true FR843838A (en) 1939-07-11

Family

ID=19936743

Family Applications (1)

Application Number Title Priority Date Filing Date
FR843838D Expired FR843838A (en) 1938-05-10 1938-09-23 Speakerphone and device for this phone

Country Status (1)

Country Link
FR (1) FR843838A (en)

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