FR54821E - Development of telephone devices - Google Patents

Development of telephone devices

Info

Publication number
FR54821E
FR54821E FR54821DA FR54821E FR 54821 E FR54821 E FR 54821E FR 54821D A FR54821D A FR 54821DA FR 54821 E FR54821 E FR 54821E
Authority
FR
France
Prior art keywords
development
telephone devices
telephone
devices
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
Andre-Felix-Emile Coueard
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 FR54821E publication Critical patent/FR54821E/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
    • H04M1/04—Supports for telephone transmitters or receivers
    • H04M1/05—Supports for telephone transmitters or receivers specially adapted for use on head, throat or breast

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR54821D 1946-09-20 1946-09-20 Development of telephone devices Expired FR54821E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR54821T 1946-09-20

Publications (1)

Publication Number Publication Date
FR54821E true FR54821E (en) 1950-08-02

Family

ID=8689239

Family Applications (2)

Application Number Title Priority Date Filing Date
FR922679D Expired FR922679A (en) 1946-09-20 1946-02-22 Improvements to telephone devices
FR54821D Expired FR54821E (en) 1946-09-20 1946-09-20 Development of telephone devices

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR922679D Expired FR922679A (en) 1946-09-20 1946-02-22 Improvements to telephone devices

Country Status (2)

Country Link
BE (1) BE469259A (en)
FR (2) FR922679A (en)

Also Published As

Publication number Publication date
BE469259A (en)
FR922679A (en) 1947-06-16

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