FR57044E - Appareil acoustique portatif - Google Patents

Appareil acoustique portatif

Info

Publication number
FR57044E
FR57044E FR57044DA FR57044E FR 57044 E FR57044 E FR 57044E FR 57044D A FR57044D A FR 57044DA FR 57044 E FR57044 E FR 57044E
Authority
FR
France
Prior art keywords
hearing aid
portable hearing
portable
aid
hearing
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
English (en)
Inventor
Robert Geffroy
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 FR57044E publication Critical patent/FR57044E/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/001—Two-way communication systems between a limited number of parties

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR57044D 1946-08-17 1946-10-28 Appareil acoustique portatif Expired FR57044E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1002222T 1946-08-17

Publications (1)

Publication Number Publication Date
FR57044E true FR57044E (fr) 1952-10-21

Family

ID=9561955

Family Applications (2)

Application Number Title Priority Date Filing Date
FR1002222D Expired FR1002222A (fr) 1946-08-17 1946-08-17 Appareil acoustique portatif
FR57044D Expired FR57044E (fr) 1946-08-17 1946-10-28 Appareil acoustique portatif

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR1002222D Expired FR1002222A (fr) 1946-08-17 1946-08-17 Appareil acoustique portatif

Country Status (1)

Country Link
FR (2) FR1002222A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971763C (de) * 1954-04-18 1959-03-26 Fredo Nestler Schaltanordnung fuer Fernsprechanlagen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971763C (de) * 1954-04-18 1959-03-26 Fredo Nestler Schaltanordnung fuer Fernsprechanlagen

Also Published As

Publication number Publication date
FR1002222A (fr) 1952-03-04

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