FR1002222A - Portable hearing aid - Google Patents

Portable hearing aid

Info

Publication number
FR1002222A
FR1002222A FR1002222DA FR1002222A FR 1002222 A FR1002222 A FR 1002222A FR 1002222D A FR1002222D A FR 1002222DA FR 1002222 A FR1002222 A FR 1002222A
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
French (fr)
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 FR1002222A publication Critical patent/FR1002222A/en
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)
FR1002222D 1946-08-17 1946-08-17 Portable hearing aid Expired FR1002222A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
FR1002222A true FR1002222A (en) 1952-03-04

Family

ID=9561955

Family Applications (2)

Application Number Title Priority Date Filing Date
FR1002222D Expired FR1002222A (en) 1946-08-17 1946-08-17 Portable hearing aid
FR57044D Expired FR57044E (en) 1946-08-17 1946-10-28 Portable hearing aid

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR57044D Expired FR57044E (en) 1946-08-17 1946-10-28 Portable hearing aid

Country Status (1)

Country Link
FR (2) FR1002222A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971763C (en) * 1954-04-18 1959-03-26 Fredo Nestler Switching arrangement for telephone systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971763C (en) * 1954-04-18 1959-03-26 Fredo Nestler Switching arrangement for telephone systems

Also Published As

Publication number Publication date
FR57044E (en) 1952-10-21

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